Trevor H. Worthy, Suzanne J. Hand, Jennifer P. Worthy, Alan J. D. Tennyson e R. Paul Scofield, A large fruit pigeon (Columbidae) from the Early Miocene of New Zealand, in The Auk, vol. 126, n. 3, 2009, pp. 649–656, DOI:10.1525/auk.2009.08244.
«Because Columba calcaria Milne-Edwards, 1867–1871, from the Lower Miocene at Saint-Gérand-le-Puy in France, is now also considered a sandgrouse, as Gerandia calcaria (Mlíkovský 2002), there is no pre-Pliocene columbid record in Europe.»