Review on Quercus Dalechampii Ten. and Quercus Petraea (Mattuschka) Liebl. In the Vegetation of Bulgaria. Год. СУ, БФ, Книга 2 - Ботаника 2016, 100, 116-123. https://doi.org/10.60066/GSU.BIOFAC.Bot.100.116-123.