Mahmood, M. Khalid, Ahmad, Farooq. An informal enumeration of squares of 2k using rooted trees arising from congruences. A Canadian journal of applied mathematics, computer science and statistics [Internet]. 2017 Nov. 9 [cited 2026 May 1];105. Available from: https://utilitasmathematica.com/index.php/Index/article/view/1162