1. Kremer, A. and Hipp, A.L., Oaks: an evolutionary success story, New Phytol., 2020, vol. 226, no. 4, pp. 987—1011. https://doi.org/10.1111/nph.16274
2. An updated infrageneric classification of the oaks: review of previous taxonomic schemes and synthesis of evolutionary patterns;T. Denk,2017
3. Hipp, A.L., Manos, P.S., Hahn, M., et al., Genomic landscape of the global oak phylogeny, New Phytol., 2020, vol. 226, no. 4, pp. 1198—1212. https://doi.org/10.1111/nph.16162
4. Takhtadzhyan, A.L., Floristicheskie oblasti Zemli (Floristic Regions of the Earth), Leningrad: Nauka, 1978.
5. Konspekt flory Kavkaza v 3 tomakh (Synopsis of the Flora of the Caucasus in 3 volumes) Kudryashova, G.L. and Tatanov, I.V., Eds., Moscow: KMK, 2012, vol. 3, part 2.