BibTeX: 
@article{Affine_ArithmeticAFP,
author = {Fabian Immler},
title = {Affine Arithmetic},
journal = {Archive of Formal Proofs},
month = feb,
year = 2014,
note = {\url{http://isaafp.org/entries/Affine_Arithmetic.html},
Formal proof development},
ISSN = {2150914x},
}
