AVHUNBAEVA, G.; KURMANOV, E.; SABAYEV, E. To the two-parameter theory gravitational lenses. Recent Contributions to Physics, [S. l.], v. 48, n. 1, p. 74–79, 2014. Disponível em: https://bph.kaznu.kz/index.php/zhuzhu/article/view/762. Acesso em: 12 apr. 2026.