@article{01660364,
title = {Combinatorial aspects of an exact sequence that is related to a graphs.},
journal = {S\'eminaire Lotharingien de Combinatoire [electronic only]},
volume = {29},
year = {1992},
zbl = {0978.05533},
language = {en},
url = {http://dml.mathdoc.fr/item/01660364}
}
Hofmeister, M. Combinatorial aspects of an exact sequence that is related to a graphs.. Séminaire Lotharingien de Combinatoire [electronic only], Tome 29 (1992) . http://gdmltest.u-ga.fr/item/01660364/