@article{02161317, title = {Counting peaks and valleys in }, journal = {The Electronic Journal of Combinatorics [electronic only]}, volume = {12}, year = {2005}, zbl = {1060.05009}, language = {en}, url = {http://dml.mathdoc.fr/item/02161317} }
Sapounakis, A.; Tsikouras, P. Counting peaks and valleys in . The Electronic Journal of Combinatorics [electronic only], Tome 12 (2005) . http://gdmltest.u-ga.fr/item/02161317/