KOWERSKI, M.; PONINKIEWICZ, M. 4th Lublin Statistical-Demographic Competition “Sigma Kwadrat” (account). Regional Barometer. Analyses & Prognoses, [S. l.], v. 11, n. 2, p. 99–100, 2013. Disponível em: https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/1133. Acesso em: 8 nov. 2024.