Gessel, I. M. (2024). Counting up-up-or-down-down permutations.
Cita Chicago Style (17a ed.)Gessel, Ira M. Counting Up-up-or-down-down Permutations. 2024.
Cita MLA (9a ed.)Gessel, Ira M. Counting Up-up-or-down-down Permutations. 2024.
Precaución: Estas citas no son 100% exactas.