(en) Richard Owen, « Evidence of a Large Extinct Monotreme (Echidna Ramsayi, Ow.) from the Wellington Breccia Cave, New South Wales », Proceedings of the Royal Society of London, vol. 36, nos 228–231, , p. 4 (DOI10.1098/rspl.1883.0073, JSTOR109445, lire en ligne)
doi.org
dx.doi.org
(en) Richard Owen, « Evidence of a Large Extinct Monotreme (Echidna Ramsayi, Ow.) from the Wellington Breccia Cave, New South Wales », Proceedings of the Royal Society of London, vol. 36, nos 228–231, , p. 4 (DOI10.1098/rspl.1883.0073, JSTOR109445, lire en ligne)
jstor.org
(en) Richard Owen, « Evidence of a Large Extinct Monotreme (Echidna Ramsayi, Ow.) from the Wellington Breccia Cave, New South Wales », Proceedings of the Royal Society of London, vol. 36, nos 228–231, , p. 4 (DOI10.1098/rspl.1883.0073, JSTOR109445, lire en ligne)