Buckley, Michael: Ancient collagen reveals evolutionary history of the endemic South American ‘ungulates’. Proceedings of the Royal Society B, 1.4.2015, 282. vsk, nro 1806. The Royal Society. doi:10.1098/rspb.2014.2671Artikkelin verkkoversio. Viitattu 11.9.2018 (englanniksi).
Buckley, Michael: Ancient collagen reveals evolutionary history of the endemic South American ‘ungulates’. Proceedings of the Royal Society B, 1.4.2015, 282. vsk, nro 1806. The Royal Society. doi:10.1098/rspb.2014.2671Artikkelin verkkoversio. Viitattu 11.9.2018 (englanniksi).