BibTeX: 
@article{Concurrent_Ref_AlgAFP,
author = {Julian Fell and Ian J. Hayes and Andrius Velykis},
title = {Concurrent Refinement Algebra and Rely Quotients},
journal = {Archive of Formal Proofs},
month = dec,
year = 2016,
note = {\url{http://isaafp.org/entries/Concurrent_Ref_Alg.html},
Formal proof development},
ISSN = {2150914x},
}
