@article{05050775, title = {Reduced canonical forms of stoppers.}, journal = {The Electronic Journal of Combinatorics [electronic only]}, volume = {13}, year = {2006}, zbl = {1137.91334}, language = {en}, url = {http://dml.mathdoc.fr/item/05050775} }
Siegel, Aaron N. Reduced canonical forms of stoppers.. The Electronic Journal of Combinatorics [electronic only], Tome 13 (2006) . http://gdmltest.u-ga.fr/item/05050775/