@article{GDZPPN002338041, title = {Combinatorial formulae for multiple set-valued labellings.}, journal = {Mathematische Annalen}, volume = {295}, year = {1993}, pages = {35-62}, zbl = {0791.05007}, url = {http://dml.mathdoc.fr/item/GDZPPN002338041} }
Shih, Mau-Hsiang; Lee, Shyh-Nan. Combinatorial formulae for multiple set-valued labellings.. Mathematische Annalen, Tome 295 (1993) pp. 35-62. http://gdmltest.u-ga.fr/item/GDZPPN002338041/