AŽUBALIS, Algirdas. Concerns education of logical thinking at mathematic lessons at primary school in Lithuania in the 6–9 decades of the XX century. Lietuvos matematikos rinkinys, [S. l.], v. 45, n. spec., p. 221–225, 2005. DOI: 10.15388/LMR.2005.26649. Disponível em: https://www.journals.vu.lt/LMR/article/view/26649.. Acesso em: 20 may. 2024.