1. Alekseeva, N.V., Evolyutsiya prirodnoi sredy Zapadnogo Zabaikal’ya v pozdnem kainozoe (po dannym fauny melkikh mlekopitayushchikh) (Paleoenvironmental Evolution of Western Transbaikalia in the Late Cenozoic (Based on the Fauna of Small Mammals), Moscow: GEOS, 2005.
2. Barker, F.K., Burns, K.J., Klicka, J., et al., New insights into New World biogeography: An integrated view from the phylogeny of blackbirds, cardinals, sparrows, tanagers, warblers, and allies, Auk, 2015, vol. 132, no. 2, pp. 333–348.
3. Boev, Z.N., Chauvireria balcanica gen. n., sp. n. (Phasianidae – Galliformes) from the Middle Villafranchian of Western Bulgaria, Geol. Balc., 1997, vol. 27, no. 3–4, pp. 69–78.
4. Boev, Z.N., Neogene avifaunas of Bulgaria, Vertebr. Palasiat., 2000, vol. 38, pp. 2–3.
5. Clement, P., Yellow-fronted canary (Crithagra mozambica), Handbook of the Birds of the World Alive, del Hoyo, J., Elliott, A., Sargatal, J., et al., Eds., Barcelona: Lynx, 2019 (retrieved from https://www.hbw.com/node/61308 on 28 October 2019).