Kosareva, Natalja, and Aleksandras Krylovas. “Diagnostinio Testo Matematinio Modelio Tyrimas”. Lietuvos matematikos rinkinys 50, no. proc. LMS (December 20, 2009): 202–207. Accessed July 2, 2025. https://www.zurnalai.vu.lt/LMR/article/view/17964.