AŽUBALIS, Algirdas. Descartes’ Mathematical Ideas in the Earliest Lithuanian Textbooks. Problemos, [S. l.], v. 52, p. 74–78, 1998. DOI: 10.15388/Problemos.1998.52.6937. Disponível em: https://test.zurnalai.vu.lt/problemos/article/view/6937. Acesso em: 28 oct. 2025.