European Journal of Combinatorics > 2010 > 31 > 2 > 644-648
Source
Abstract
Identifiers
journal ISSN : | 0195-6698 |
DOI | 10.1016/j.ejc.2009.03.045 |
European Journal of Combinatorics > 2010 > 31 > 2 > 644-648
journal ISSN : | 0195-6698 |
DOI | 10.1016/j.ejc.2009.03.045 |