Hogstad, Olav. (2016) Pair fidelity of wintering Bullfinches; observations over 24 years. Det Kongelige Norske Videnskabers Selskabs Skrifter. vol. 2016 (2). http://www.dknvs.no/publikasjoner/
Jobling, J. A. (2017). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2017). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
Clement, P. & Christie, D.A. (2017). Eurasian Bullfinch (Pyrrhula pyrrhula). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona