Sotnikova, Marina et al.: New species of Ballusia Ginsburg and Morales, 1998 (Ursidae, Carnivora) from Miocene of Eastern Siberia, Russia. Historical Biology, 3.4.2021, 33. vsk, nro 4, s. 486–497. Taylor & Francis. doi:10.1080/08912963.2019.1637864ISSN 0891-2963Artikkelin verkkoversio. Viitattu 3.12.2021. (englanniksi)
doi.org
dx.doi.org
Sotnikova, Marina et al.: New species of Ballusia Ginsburg and Morales, 1998 (Ursidae, Carnivora) from Miocene of Eastern Siberia, Russia. Historical Biology, 3.4.2021, 33. vsk, nro 4, s. 486–497. Taylor & Francis. doi:10.1080/08912963.2019.1637864ISSN 0891-2963Artikkelin verkkoversio. Viitattu 3.12.2021. (englanniksi)
Abella, Juan & Montoya, Plini & Morales, Jorge: Paleodiversity of the Superfamily Ursoidea (Carnivora, Mammalia) in the Spanish Neogene, related to environmental changes. Journal of Iberian Geology, 21.1.2014, 40. vsk, nro 1, s. 11–18. doi:10.5209/rev_JIGE.2014.v40.n1.44083ISSN 1886-7995Artikkelin verkkoversio. Viitattu 3.12.2021. (englanniksi)
Abella, Juan & Montoya, Plini & Morales, Jorge: Paleodiversity of the Superfamily Ursoidea (Carnivora, Mammalia) in the Spanish Neogene, related to environmental changes. Journal of Iberian Geology, 21.1.2014, 40. vsk, nro 1, s. 11–18. doi:10.5209/rev_JIGE.2014.v40.n1.44083ISSN 1886-7995Artikkelin verkkoversio. Viitattu 3.12.2021. (englanniksi)
worldcat.org
Sotnikova, Marina et al.: New species of Ballusia Ginsburg and Morales, 1998 (Ursidae, Carnivora) from Miocene of Eastern Siberia, Russia. Historical Biology, 3.4.2021, 33. vsk, nro 4, s. 486–497. Taylor & Francis. doi:10.1080/08912963.2019.1637864ISSN 0891-2963Artikkelin verkkoversio. Viitattu 3.12.2021. (englanniksi)
Abella, Juan & Montoya, Plini & Morales, Jorge: Paleodiversity of the Superfamily Ursoidea (Carnivora, Mammalia) in the Spanish Neogene, related to environmental changes. Journal of Iberian Geology, 21.1.2014, 40. vsk, nro 1, s. 11–18. doi:10.5209/rev_JIGE.2014.v40.n1.44083ISSN 1886-7995Artikkelin verkkoversio. Viitattu 3.12.2021. (englanniksi)