DOICHINOVA, V.; YOROVA, K. Sorption Properties of Urban, Forest and Technogenic Soils in Sofia Region. Bulgarian Journal of Soil Science, Agrochemistry and Ecology, Sofia, BG, v. 47, n. 1, p. 64–70, 2013. Disponível em: https://agriacad.eu/ojs/index.php/bjssae/article/view/3985.. Acesso em: 22 oct. 2026.