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Viviparity and intrauterine feeding in a new Holocephalan fish from the Lower Carboniferous of Montana. Science, 209, 697–699
DOI: 10.1126/science.209.4457.69
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Chondrichthyan life history styles as revealed by the 320 million years old Mississippian of Montana. Environmental Biology of Fishes, 27(1), 1–19
DOI: 10.1007/BF00004900
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Fossilienatlas Fische. Verlag für Natur- und Heimatkunde Hans A. Baensch, Melle