Jelen B, Mervič H, Horvat A, Pavšič J. Changes of the microfossil assemblages in the Oligocene of the Zasavje region. geologija [Internet]. 1988 Jun. 30 [cited 2026 Oct. 26];31(1):329-45. Available from: https://www.geologija-revija.si/index.php/geologija/article/view/616