Frank Ruskey. A simple proof of a formula of Dershowitz and Zaks. Discrete Mathematics, 43(1):117-118, 1983. [doi]
@article{Ruskey83,
title = {A simple proof of a formula of Dershowitz and Zaks},
author = {Frank Ruskey},
year = {1983},
doi = {10.1016/0012-365X(83)90028-6},
url = {http://dx.doi.org/10.1016/0012-365X(83)90028-6},
researchr = {https://researchr.org/publication/Ruskey83},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {43},
number = {1},
pages = {117-118},
}