V. Doichinova and K. Yorova, “Sorption Properties of Urban, Forest and Technogenic Soils in Sofia Region”, BJSSAE, vol. 47, no. 1, pp. 64–70, Mar. 2013, Accessed: Oct. 22, 2026. [Online]. Available: https://agriacad.eu/ojs/index.php/bjssae/article/view/3985