KOTVYTSKIY, A. T.; BRONZA, S. D.; SHABLENKO, V. Y. CORRELATION OF THE NUMBER OF IMAGES OF AN N-POINT GRAVITATIONAL LENS AND THE NUMBER OF SOLUTIONS OF ITS SYSTEM. Одеські астрономічні публікації, [S. l.], v. 30, p. 35–37, 2017. DOI: 10.18524/1810-4215.2017.30.114229. Disponível em: http://oap.onu.edu.ua/article/view/114229. Acesso em: 14 груд. 2025.