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Marine to onshore vertebrates in the Lower Permian of Kansas and their paleoenvironmental implications. The University of Kansas Paleontological Contributions, 113, 1–18
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Clear Fork vertebrates and environments from the lower Permian of North-Central Texas. The Texas Journal of Science, 39(3): 253–266
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The Arroyo Formation (Leonardian: Lower Permian) and Its Vertebrate Fossils. Texas Memorial Museum Bulletin, 35: 30pp
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Vertebrate Microfossils from the Lueders Formation, Albany Group, and the faunal transition from the Wichita Group into the Clear Fork Group, Lower Permian of Texas. Modern Geology, 20, 371–382
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Geology and Vertebrate Fauna of a New Site in the Wellington Formation (Lower Permian) of Northern Oklahoma. Oklahoma Geology Notes, 62(2), 63–66
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Dentitions of Barbclabornia (new genus, Chondrichthyes: Xenacanthiformes) from the upper Palaeozoic of North America. Mitteilungen aus dem Museum für Naturkunde in Berlin, Geowissenschaftliche Reihe, 6, 125–160
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Dentitions of Barbclabornia (new genus, Chondrichthyes: Xenacanthiformes) from the upper Palaeozoic of North America. Mitteilungen aus dem Museum für Naturkunde in Berlin, Geowissenschaftliche Reihe, 6, 125–160
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New specimens of xenacanth and hybodont sharks (Elasmobranchii: Xenacanthida and Hybodontoidea) from the Lower Permian of southwestern Oklahoma. Oklahoma Geology Notes, 63(4), 136–147
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Underdeveloped and unusual xenacanth shark teeth from the Lower Permian of Texas. Proceedings of the South Dakota Academy of Science, 84, 215– 223
Johnson, G.D. (2005)
An unusual tricuspid chondrichthyan tooth from the Lower Permian of Texas, USA. Revista Brasileira de Paleontologia, 8(2), 159–164
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Evidence For Enameloid In Xenacanthid Shark Teeth [Abstract]. Proceedings of the South Dakota Academy of Science, 85, 295
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Vertebrate biostratigraphy and biochronology of the upper Paleozoic Dunkard Group, Pennsylvania-West Virginia-Ohio, USA. International Journal of Coal Geology, 119, 79–87
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Lower Permian Freshwater Sharks and Fishes of Texas and Oklahoma. published by the author himself, 118pp
Fischer, J. & Schneider, J.W. & Hodnett, J.-P.M. & Elliott, D.K. & Johnson, G.D. & Voigt, S. & Joachimski, M.M. & Tichomirowa, M. & Götze, J. (2014)
Stable and radiogenic isotope analyses on shark teeth from the Early to the Middle Permian (Sakmarian–Roadian) of the southwestern USA. Historical Biology, 26(6), 710–727
DOI: 10.1080/08912963.2013.838953