AŽUBALIS, Algirdas. The books of problems in arithmetic by Mikas Petrauskas. Lietuvos matematikos rinkinys, [S. l.], v. 54, n. B, p. 75–80, 2013. DOI: 10.15388/LMR.B.2013.15. Disponível em: https://www.journals.vu.lt/LMR/article/view/17156.. Acesso em: 3 may. 2024.