Loreille, O. (2001). „Ancient DNA analysis reveals divergence of the cave bear, Ursus spelaeus, and brown bear, Ursus arctos, lineages”. Current Biology11 (3), 200–203. o. DOI:10.1016/S0960-9822(01)00046-X. PMID11231157.
Loreille, O. (2001). „Ancient DNA analysis reveals divergence of the cave bear, Ursus spelaeus, and brown bear, Ursus arctos, lineages”. Current Biology11 (3), 200–203. o. DOI:10.1016/S0960-9822(01)00046-X. PMID11231157.