Intraspecific Variability of the Sessile Oak (Quercus petraea Matt. Liebl.) Leaf Traits from the Mount Kosmaj (Serbia) Autori: Marija Jovanović, Ivona Kerkez Janković, Jelena Milovanović, Marina Nonić, Mirjana Šijačić-Nikolić Časopis: Biology Bulletin DOI: 10.1134/S1062359023602471