Gesneriaceae: Leaves of Ramonda serbica (left) and R. nathaliae (right). Garden material of unknown origin cultivated in Göteborg Botanical Garden, phot. 2006-08-03.
Dimopoulos, P., Raus, Th., Bergmeier, E., Constantinidis, Th., Iatrou, G., Kokkini, S., Strid, A. & Tzanoudakis, D. 2013: Vascular plants of Greece: An annotated checklist. 31: p. 341