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@article{JIS_2004__7_2_a0, author = {Sapounakis, A. and Tsikouras, P.}, title = {On $k$-colored {Motzkin} words}, journal = {Journal of integer sequences}, publisher = {mathdoc}, volume = {7}, number = {2}, year = {2004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/JIS_2004__7_2_a0/} }
Sapounakis, A.; Tsikouras, P. On $k$-colored Motzkin words. Journal of integer sequences, Tome 7 (2004) no. 2. http://geodesic.mathdoc.fr/item/JIS_2004__7_2_a0/