Johnson, C. N. (23 Eylül 2002). "Determinants of Loss of Mammal Species during the Late Quaternary 'Megafauna' Extinctions: Life History and Ecology, but Not Body Size". Proceedings of the Royal Society of London B. 269 (1506). The Royal Society. ss. 2221-2227 (see p. 2225). doi:10.1098/rspb.2002.2130. JSTOR3558643.
jstor.org
Johnson, C. N. (23 Eylül 2002). "Determinants of Loss of Mammal Species during the Late Quaternary 'Megafauna' Extinctions: Life History and Ecology, but Not Body Size". Proceedings of the Royal Society of London B. 269 (1506). The Royal Society. ss. 2221-2227 (see p. 2225). doi:10.1098/rspb.2002.2130. JSTOR3558643.