PIETRZAK, M. B. The problem of identification the structure of spatial data. Acta Universitatis Nicolai Copernici Ekonomia, [S. l.], v. 41, p. 83–98, 2010. DOI: 10.12775/AUNC_ECON.2010.006. Disponível em: https://apcz.umk.pl/AUNC_EKON/article/view/AUNC_ECON.2010.006. Acesso em: 4 jul. 2024.