BABAYAN, Armenak; GEVORGYAN, Levon. A life, devoted to the science. Armenian Journal of Mathematics, Yerevan, Armenia, v. 3, n. 4, p. 142–151, 2017. Disponível em: https://armjmath.sci.am/index.php/ajm/article/view/129. Acesso em: 4 apr. 2025.