Morphological variation of Jovibarba heuffelii (Crassulaceae) in the central Balkan Peninsula—The impact of geological, orographical and bioclimatic factors on the differentiation of populations
. Phytotaxa. 203, 3 (Mar. 2015), 213–230. DOI:https://doi.org/10.11646/phytotaxa.203.3.1.