Ragalytė, Birutė, and Alma Paukštienė. “Metric System Education in J. Damijonaitis Manuals”. Lietuvos matematikos rinkinys 43, no. spec. (December 22, 2003): 398–402. Accessed November 7, 2025. https://www.zurnalai.vu.lt/LMR/article/view/32462.