References

Available under Creative Commons-ShareAlike 4.0 International License.

Keisler, J., ElementaryCalculus:An ApproachUsingInfinitesimals,

www.math.wisc.edu/~keisler/calc.html

Livshits, Michael, mathfoolery.org/calculus.html

Marsden and Weinstein, Calculus Unlimited,

www.cds.caltech.edu/~marsden/books/Calculus_Unlimited.html

Mathforum.org, Nonstandard Analysis and the Hyperreals,

http://mathforum.org/dr.math/faq/analysis_hyperreals.html

Robinson, A., Non-StandardAnalysis, Princeton University Press

Stroyan, K., A Brief Introduction to Infinitesimal Calculus,

www.math.uiowa.edu/~stroyan/InfsmlCalculus/InfsmlCalc.htm

Tall, D., Looking at graphs through infinitesimal microscopes, windows andtelescopes, Mathematical Gazette, 64, 22-49, http://www.warwick.ac.uk/staff/David.Tall/downloads.html