Čirba, Stasys, Jonas Daunoravičius, and Juozas Raulynaitis. “Statistical Analysis of Mathematical Marks in Secondary Schools and University”. Lietuvos matematikos rinkinys 44, no. spec. (December 17, 2004): 415–419. Accessed January 17, 2026. https://www.zurnalai.vu.lt/LMR/article/view/31963.