APA (7th ed.) Citation

Gessel, I. M. (2024). Counting up-up-or-down-down permutations.

Chicago Style (17th ed.) Citation

Gessel, Ira M. Counting Up-up-or-down-down Permutations. 2024.

MLA (9th ed.) Citation

Gessel, Ira M. Counting Up-up-or-down-down Permutations. 2024.

Warning: These citations may not always be 100% accurate.