BibTeX: 
@article{Source_Coding_TheoremAFP,
author = {Quentin Hibon and Lawrence Paulson},
title = {Source Coding Theorem},
journal = {Archive of Formal Proofs},
month = oct,
year = 2016,
note = {\url{http://isaafp.org/entries/Source_Coding_Theorem.shtml},
Formal proof development},
ISSN = {2150914x},
}
