@article{05068448, title = {Animals and 2-Motzkin paths.}, journal = {Journal of Integer Sequences [electronic only]}, volume = {8}, year = {2005}, zbl = {1103.05008}, language = {en}, url = {http://dml.mathdoc.fr/item/05068448} }
Woan, Wen-jin. Animals and 2-Motzkin paths.. Journal of Integer Sequences [electronic only], Tome 8 (2005) . http://gdmltest.u-ga.fr/item/05068448/