RZĄSA, K.; CISKI, M. Determination of the level of sustainable development of the cities - a proposal for a method of classifying objects based on natural breaks. Acta Scientiarum Polonorum Administratio Locorum, [S. l.], v. 20, n. 3, p. 215–239, 2021. DOI: 10.31648/aspal.6701. Disponível em: https://czasopisma.uwm.edu.pl/index.php/aspal/article/view/6701. Acesso em: 7 may. 2024.