- "George Washington’s Use of Trigonometry and Logarithms"

- "Machin's formula for computing pi"

- "ARITHMOS, YBC 7289, ORESME and Laplace," to appear in the CSHPM/SCHPM Newsletter.

- "The Archimedes Palimpsest Exhibit—See It Until January 1," Mathematical Association of America History of Mathematics Special Interest Group Newsletter, Volume VI, Number 1, December 2011.

- "Mathematics in Greece and Italy," Mathematical Association of America History of Mathematics Special Interest Group Newsletter, Volume V, Number 1, August 2010.

- "Historical Research Projects For You and Your Students," Mathematical Association of America History of Mathematics Special Interest Group Newsletter, Volume IV, Number 1, August 2009. There is a longer
web version.

- "Classroom Technology at West Point," Mathematica Militaris, vol. 18, Issue 1, Winter 2010, pp. 2-11.

- "The impact of ballistics on mathematics. The work of Robins and Euler in the eighteenth-century," Proceedings of the 16th ARL/USMA Technical Symposium. Text. Power Point.
- "Buy this book, read this book, enjoy this book!" an editorial in the July/August 2008 issue of SB & F (Science Books and Films), published by AAAS. Joint work with Florence Fasanellli.
- "Why have a frontispiece? Examples from the Michalowicz Collection at American University," Revista Brasileica de Historia da Matematica. This special issue of the journal of the Brazilian Society for the History of Mathematics was a Festschrift for Ubiratan D'Ambrosio. It appeared December 2007. Joint work with Florence D. Fasanelli of the American Association for the Advancement of Science (AAAS).
- "Mathematics Education at West Point: The First Hundred Years." Published in Convergence. Joint work with Amy Shell-Gellasch.
- "What is 0^0", joint work with Michael Huber. Published in Convergence. Old version: What is 00?
- "Build a brachistochrone and captivate your class," in Hands on History. A Resource for Teaching Mathematics, a volume published by the Mathematical Association of American (MAA).
- "Would Isaac Newton read Harry Potter?," Phi Kappa Phi Forum, vol. 84, no. 4 (Fall 2004), p. 53. Joint work with Michael Huber and Michael Phillips.
- "201 Years of Mathematics at West Point," pp. 586-613 in West Point: Two Centuries and Beyond, edited by Lance A. Betros. Joint work with Amy Shell-Gellasch.
- Book review of West Point's Scientific 200 by Chris Arney, with CPT Ray Eason, Mathematica Militaris, Spring 2002.
- "The First Century of Mathematics at West Point," pp. 25-25 in History of Undergraduate Mathematics in America. Proceeding of a Conference Held at the United States Military Academy, West Point, NY, June 21-24 (2001), edited by Amy Shell-Gellasch.
- A Station Favorable to the Pursits of Science: Primary Materials in the History of Mathematics at the United States Military Academy, with Joe Albree and David C. Arney. Jointly published by the American Mathematical Society and the London Mathematical Society, volume 18 in the History of Mathematics Series, xii + 272pp 2000, ISBN 0-8218-2059-1.
- "Greek Mathematics," to be published in Portuguese translation.
- "The Necessity of History in Teaching Mathematics," pp. 251-256 in Vita Mathematica: Historical Research and Integration with Teaching, edited by Ronald Calinger, MAA Notes Number 40, 1996.
- "My Favorite Ways of Using History in Teaching Calculus," pp. 123-134 in Learn From the Masters, edited by Frank Swetz et alia, MAA Classroom Resource Materials, 1995. A preliminary version appeared on pp. 115-127 of Learn From the Masters!, Pennsylvania State University, edited by Otto Bekken et al., 1992.
- "Isaac Newton: Man, Myth, and Mathematics," pp. 483-507 in From Five Fingers to Infinity. A Journey Through the History of Mathematics, edited by Frank J. Swetz, Open Court, 1994. This paper, which won the MAA Polya Prize, originally appeared in The College Mathematics Journal, 18(1987), 362-389. MR 89g:01025. Spanish translation as "Isaac Newton: hombre, mito y mathematicas," Mathesis, 6(1990), 119-162.
- "Focus on the MAA Gopher," p. 20 in Focus, The Newsletter of the Mathematical Association of America, vol. 14, no. 4, August 1994.
- "Math Majors Tell (Almost) All," Math Horizons, Spring 1994, pp. 14-17. With Anita Solow.
- "O KANONAS TOY GINOMENOY STHN PAPAGWGISH," (On the History of the Product Rule), Diastasn, 3-4 (1992), pp. 68-72.
- "TO SYMBALO TOY OLOKLHPWMATOS,” (On the Symbol for Integration), Diastasn, 3-4 (1992), pp. 72-75.
- "An annotated Lesniewski Bibliography," pp. 711-785 in Stanislaw Lesniewski. Collected Works, Dordrecht: Klewer, 1992.

- "How Columbus encountered America," Mathematics Magazine, 65(1992), 219-225.
- "An application of geography to mathematics: History of the integral of the secant," pp. 12-16 in A Century of Calculus, Part II: 1969-1991, edited by Tom M. Apostol, et al., published by the MAA, 1992. Reprint of an article which appeared in Mathematics Magazine, 53(1980), 162-166. With Philip M. Tuchinsky. MR 82g:01019.
- Library Recommendations for Undergraduate Mathematics. Published by the Mathematical Association of America, 1992, as MAA Report #4, edited by Lynn A. Steen. I led the group that worked on the history of mathematics section. Much of the material also appears in Two-year College Mathematics Library Recommendations, MAA Report #5, 1992, edited by Steen.
- "Why do we use 'm' for slope?" Ganita-Bharati; Bulletin of the Indian Society for the History of Mathematics, vol. 12, nos. 1-2 (1990), p. 48. Reprinted from the HPM Newsletter, no. 19, February 1990, pp. 7-8.
- "Beginnings [of the Ohio Section of the MAA]," pp. 1-12 in The Ohio Section: 1915-1990, edited by David E. Kullman, published by the Ohio Section of the Mathematical Association of America, 1990.
- "History of the Calculus Bibliography," in Priming the Calculus Pump: Innovations and Resources, Thomas W. Tucker, editor. Published by the MAA, 1990.
- "In praise of genius: Isaac Newton as a role model," Indiana Mathematics Teacher, vol. 3, no. 2, Spring/Summer 1989, pp. 21-26.
- "W. E. Story of Hopkins and Clark," pp. 29-76 in A Century of Mathematics in America, Part III, published by the American Mathematical Society, 1989. Joint work with Roger Cooke. MR 91h:01026.
- A Calendar of Mathematical Dates, 128pp. Privately printed, 1986.
- "Interpretations of Lesniewski's ontology," Dialectica, 39(1985), 181-192.
- Contributions on the history of logic in The History of Mathematics from Antiquity to the Present. A Selected Bibliography, edited by Joseph W. Dauben. New York: Garland Press, 1985.
- Lesniewski's Systems. Ontology and Mereology, Polish Academy of Science, 1984 (appeared 1985), 264pp. This collection of papers was jointly edited with Jan Srzednicki.
- "Mathematics of the Gregorian calendar," The Mathematical Intelligencer, 7(1985), no. 1, 53-56. MR 86d:01001.
- "Cuneiform numerals at the Toledo Museum of Art," Greater Toledo Council of Teachers of Mathematics Newsletter, February 1984, 2-4.
- "Boleslaw Sobocinski 1906-1980," Proceedings and Addresses of the American Philosophical Association, 55(1982), 498-499.
- "Mathematics at the Toledo Museum of Art," Greater Toledo Council of Teachers of Mathematics Newsletter, April 1981, pp. 6-7.
- "Inequalities in the real world," Greater Toledo Council of Teachers of Mathematics Newsletter, November 1978, pages 1 and 10.
- "On creative definitions in first order functional calculi," Notre Dame Journal of Formal Logic, 19(1978), 307-309. MR 58#5012.
- "A survey of Lesniewski's logic," Studia Logica, 36 (For 1977, published 1978), 407-426. MR 80b:03031. Reprinted in Lesniewski's systems: protothetic, edited by Jan T.J. Srzednicki and Zbigniew Stachniak. Dordrecht ; Boston : Kluwer Academic, c1998.
- "On creative definitions in the Principia Mathematica," Logique et Analyse, n.s. 18(1975), no. 69-70, pp. 175-182. MR 53#7721.
- "Creative definitions in propositional calculi," Notre Dame Journal of Formal Logic, 16(1975), 273-294. MR 52#38.
- "The one variable implicational calculus," Notre Dame Journal of Formal Logic, 15(1974), 478-480. MR 51 #2856.
- "Axiomatic inscriptional syntax, part II: The syntax of protothetic," Notre Dame Journal of Formal Logic, 14(1973), 1-52. MR 50#4257. Reprinted in Lesniewski's systems: protothetic, edited by Jan T.J. Srzednicki and Zbigniew Stachniak. Dordrecht ; Boston : Kluwer Academic, c1998.
- "Axiomatic inscriptional syntax, part I: General syntax," Notre Dame Journal of Formal Logic, 13(1972), 1-33. MR 48#1880.
- "On weak and strong validity of rules for the propositional calculus," Notre Dame Journal of Formal Logic, 12(1971), 115-116. MR 44#2563.
- "But was there no room for them in the inn?" Notre Dame Science Quarterly, vol. 1, no. 1, 1962, pp. 12-14. With Joe Caspar.