Ragalytė, Birutė, and Alma Paukštienė. “Mathematics Methods Problems in Periodical in Lithuania Between the Two World Wars”. Lietuvos matematikos rinkinys 50, no. proc. LMS (December 20, 2009): 166–171. Accessed February 26, 2026. https://www.journals.vu.lt/LMR/article/view/17922.