Loy, A.; P. Genov; M. Galfoc; M. G. Jacobonec; A. Vigna Tagliantic (2008), „Cranial morphometrics of the Apennine brown bear (Ursus arctos marsicanus) and preliminary notes on the relationships with other southern European populations”, Italian Journal of Zoology, 75 (1): 67—75, doi:10.1080/11250000701689857
Ciucci, Paolo & Boitani, Luigi, „The Apennine Brown Bear: A Critical Review of Its Status and Conservation Problems”, Ursus, 19: 130—145, doi:10.2192/07per012.1