Ruzicka, M., & Annus, J. (1998). The Problems in Preparation of Anhydrous Sulfate Single Crystals MSO4 (M = Fe, Co, Ni). Chemické Listy, 92(2). Získáno z http://blog.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/2728