Apynis, Antanas, Romualdas Kašuba, and Eugenijus Stankus. “Regional Mathematical Contests: Experience and Perspectives”. Lietuvos matematikos rinkinys 52, no. proc. LMS (December 15, 2011): 62–66. Accessed November 6, 2025. https://www.zurnalai.vu.lt/LMR/article/view/15375.