KNIPPSCHILD, Katarzyna. On the way from black towards green border triangle. Rozwój Regionalny i Polityka Regionalna, [S. l.], n. 12, p. 149–164, 2018. Disponível em: https://pressto.amu.edu.pl/index.php/rrpr/article/view/15072. Acesso em: 18 may. 2024.