On a perfect problem. Zverovich, I. E. Discussiones Mathematicae Graph Theory, 26(2):273-277, 2006.
Link
Paper bibtex @article{journals/dmgt/Zverovich06,
added-at = {2015-08-24T00:00:00.000+0200},
author = {Zverovich, Igor E.},
biburl = {http://www.bibsonomy.org/bibtex/26c80c5ee5748e83200028c0174ce1ef5/dblp},
ee = {http://dx.doi.org/10.7151/dmgt.1318},
interhash = {760d559c86abd446df79eaf560d92c63},
intrahash = {6c80c5ee5748e83200028c0174ce1ef5},
journal = {Discussiones Mathematicae Graph Theory},
keywords = {dblp},
number = 2,
pages = {273-277},
timestamp = {2015-08-25T11:34:18.000+0200},
title = {On a perfect problem.},
url = {http://dblp.uni-trier.de/db/journals/dmgt/dmgt26.html#Zverovich06},
volume = 26,
year = 2006
}