Arthur T. Benjamin, Fritz Juhnke. Another Way of Counting ::::N:::N:::::::. SIAM J. Discrete Math., 5(3):377-379, 1992.
@article{BenjaminJ92,
title = {Another Way of Counting ::::N:::N:::::::},
author = {Arthur T. Benjamin and Fritz Juhnke},
year = {1992},
researchr = {https://researchr.org/publication/BenjaminJ92},
cites = {0},
citedby = {0},
journal = {SIAM J. Discrete Math.},
volume = {5},
number = {3},
pages = {377-379},
}