Yun Ding, Rosena R. X. Du. Counting humps in Motzkin paths. Discrete Applied Mathematics, 160(1-2):187-191, 2012. [doi]
@article{DingD12,
title = {Counting humps in Motzkin paths},
author = {Yun Ding and Rosena R. X. Du},
year = {2012},
doi = {10.1016/j.dam.2011.08.018},
url = {http://dx.doi.org/10.1016/j.dam.2011.08.018},
researchr = {https://researchr.org/publication/DingD12},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {160},
number = {1-2},
pages = {187-191},
}