@article{DBLP:journals/combinatorics/CzygrinowN03,
author = {Andrzej Czygrinow and
Brendan Nagle},
title = {Matrix-Free Proof of a Regularity Characterization},
journal = {Electr. J. Comb.},
volume = {10},
year = {2003},
ee = {http://www.combinatorics.org/Volume_10/Abstracts/v10i1r39.html},
bibsource = {DBLP, http://dblp.uni-trier.de}
}