@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/