Editing Nonstandard calculus (section)

==References==

{{sfn whitelist|CITEREFKeisler1986}}
* {{citation | first = Patrick | last = Fitzpatrick| title= Advanced Calculus|publisher = Brooks/Cole| year=2006}}
*<cite id="CITEREFKeisler1986">H. Jerome Keisler: Elementary Calculus: An Approach Using Infinitesimals. First edition 1976; 2nd edition 1986. (This book is now out of print. The publisher has reverted the copyright to the author, who has made available the 2nd edition in .pdf format available for downloading at http://www.math.wisc.edu/~keisler/calc.html.)</cite>
*H. Jerome Keisler: Foundations of Infinitesimal Calculus, available for downloading at http://www.math.wisc.edu/~keisler/foundations.html (10 jan '07)
*{{citation|first1=Andreas|last1=Blass|title=Review: Martin Davis, Applied nonstandard analysis, and K. D. Stroyan and W. A. J. Luxemburg, Introduction to the theory of infinitesimals, and H. Jerome Keisler, Foundations of infinitesimal calculus|journal=Bull. Amer. Math. Soc.| volume=84|number=1|year=1978|pages=34–41|url=https://www.ams.org/journals/bull/1978-84-01/S0002-9904-1978-14401-2/home.html|doi=10.1090/S0002-9904-1978-14401-2|doi-access=free}}
* [[Margaret Baron|Baron, Margaret E.]]: The origins of the infinitesimal calculus. Pergamon Press, Oxford-Edinburgh-New York 1969. Dover Publications, Inc., New York, 1987. (A new edition of Baron's book appeared in 2004)
* {{springer|title=Infinitesimal calculus|id=p/i050950}}