Petraitienė, Stasė, Liepa Bikulčienė, and Violeta Kravčenkienė. “The Mathematical Learning by Mathcad Software Use”. Lietuvos matematikos rinkinys 42, no. spec. (December 20, 2002): 267–270. Accessed May 18, 2024. https://www.journals.vu.lt/LMR/article/view/32900.