Pavšič Vrtač, Katarina, Breda Jakovac Strajn, Janez Salobir, Karin Šrimpf, and Gabrijela Tavčar Kalcher. 2016. “STUDY OF TRACE AND ULTRATRACE ELEMENTS IN SILAGE INTENDED FOR CATTLE NUTRITION”. Slovenian Veterinary Research 53 (1). https://www.slovetres.si/index.php/SVR/article/view/45.