References on Hyperreal Numbers and NonStandard Analysis

1) “Non-standard analysis” Abraham Robinson.

Princeton, N.J. : Princeton University Press, c1996.

(in UMB library)

2) Elementary Calculus: An Approach Using Infinitesimals

On-line Edition, by H. Jerome Keisler http://www.math.wisc.edu/~keisler/calc.html

3) Wikipedia Hyperreal Number

http://en.wikipedia.org/wiki/Hyperreal_number

4) Math Forum: Nonstandard Analysis and the Hyperreals

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