Stjepić Srkalović, Željka, in Semir Ahmetbegović. „Nickel in Tuzla Topsoils: Its Distribution and Impacts“. Revija za geografijo 16, no. 1 (junij 30, 2021): 45–56. Pridobljeno januar 11, 2026. https://old.journals.um.si/index.php/geography/article/view/3222.