@article{05540969, title = {A cluster expansion formula (}, journal = {The Electronic Journal of Combinatorics [electronic only]}, volume = {15}, year = {2008}, zbl = {1184.13064}, language = {en}, url = {http://dml.mathdoc.fr/item/05540969} }
Schiffler, Ralf. A cluster expansion formula (. The Electronic Journal of Combinatorics [electronic only], Tome 15 (2008) . http://gdmltest.u-ga.fr/item/05540969/