BibTeX: 
@article{IntegrationAFP,
author = {Stefan Richter},
title = {Integration theory and random variables},
journal = {Archive of Formal Proofs},
month = nov,
year = 2004,
note = {\url{https://isaafp.org/entries/Integration.html},
Formal proof development},
ISSN = {2150914x},
}
