Novak, Marko, and Iztok Štamfelj. “Case Report: Endodontic Treatment of a Permanent Maxillary First Molar With Three Roots and Six Root Canals : Opis Primera: Endodontsko Zdravljenje Prvega Zgornjega Stalnega kočnika S Tremi Koreninami in šestimi Koreninskimi Kanali”. Acta Medico-Biotechnica, vol. 15, no. 2, Jan. 2023, pp. 49-53, https://doi.org/10.18690/actabiomed.242.