HAROUTUNIAN, E. A. .; SAFARYAN, I. A. . Copulas of Two-Dimensional Threshold Models. Mathematical Problems of Computer Science, [S. l.], v. 31, p. 40–48, 2021. Disponível em: http://mpcs.sci.am/index.php/mpcs/article/view/390. Acesso em: 2 may. 2024.