BibTeX: 
@article{GraphMarkingIBPAFP,
author = {Viorel Preoteasa and RalphJohan Back},
title = {Verification of the DeutschSchorrWaite Graph Marking Algorithm using Data Refinement},
journal = {Archive of Formal Proofs},
month = may,
year = 2010,
note = {\url{http://isaafp.org/entries/GraphMarkingIBP.html},
Formal proof development},
ISSN = {2150914x},
}
