W. Waagen, « Die Formenreihe des Ammonites subradatus », R. Oldenbourg, München, vol. 2, no 2, , p. 248 (hdl2027/nnc1.0030928605, lire en ligne)
biodiversitylibrary.org
Francis Hemming, « Opinion 303: Designation, under the Plenary Powers, of type species in harmony with current usage for the nominal genera Kosmoceras, Perisphinctes and Harpoceras (class Cephalopoda, order Ammonoidea) established by Waagen in 1869 », Opinions and Declarations Rendered by the International Commission on Zoological Nomenclature, vol. 8, no 20, , p. 273–284 (lire en ligne)
doi.org
dx.doi.org
Bell, R. P., « Edmund John Bowen 29 April 1898 – 19 November 1980 Elected F.R.S. 1935 », Biographical Memoirs of Fellows of the Royal Society, vol. 27, , p. 83–101 (DOI10.1098/rsbm.1981.0004, JSTOR769866)
W. Waagen, « Die Formenreihe des Ammonites subradatus », R. Oldenbourg, München, vol. 2, no 2, , p. 248 (hdl2027/nnc1.0030928605, lire en ligne)
jstor.org
Bell, R. P., « Edmund John Bowen 29 April 1898 – 19 November 1980 Elected F.R.S. 1935 », Biographical Memoirs of Fellows of the Royal Society, vol. 27, , p. 83–101 (DOI10.1098/rsbm.1981.0004, JSTOR769866)