@article{DBLP:journals/entcs/VermaH02,
author = {Rakesh M. Verma and
Sarah Hwang},
title = {On the Structure of Counterexamples to Symmetric Orderings
for BDD's},
journal = {Electr. Notes Theor. Comput. Sci.},
volume = {61},
year = {2002},
pages = {84-100},
ee = {http://dx.doi.org/10.1016/S1571-0661(04)00307-X},
bibsource = {DBLP, http://dblp.uni-trier.de}
}