BibTeX: 
@article{UpDown_SchemeAFP,
author = {Johannes Hölzl},
title = {Verification of the UpDown Scheme},
journal = {Archive of Formal Proofs},
month = jan,
year = 2015,
note = {\url{http://isaafp.org/entries/UpDown_Scheme.shtml},
Formal proof development},
ISSN = {2150914x},
}
