LILIANOU, L.; PHANALASY, O.; POYEYA, S. Study the causes of delays in the country’s development with Mathematical models. Souphanouvong University Journal Multidisciplinary Research and Development , [S. l.], v. 8, n. 1, p. 49–58, 2022. Disponível em: http://www.su-journal.com/index.php/su/article/view/169. Acesso em: 17 jan. 2026.