NIKIFOROVA, A. A.; FLEIS, M. E. A universal soil classification system from the perspective of the General Theory of Classification: a review. Bulletin of Geography. Physical Geography Series, [S. l.], n. 14, p. 5–13, 2018. DOI: 10.2478/bgeo-2018-0001. Disponível em: https://apcz.umk.pl/BOGPGS/article/view/16091. Acesso em: 18 jul. 2024.