Ǵorǵi Čupona, N. Celakoski, and S. Ilić, “ON MONOASSOCIATIVE GROUPOIDS”, Mat. Bilt., vol. 26, no. 1, pp. 5–16, Jan. 2002, Accessed: Aug. 15, 2026. [Online]. Available: https://bilten.smm.org.mk/index.php/bilten/article/view/1680