Authors Year Title
Böse 1919 The Permo-Carboniferous ammonoids of the Glass Mountains, west Texas, and their stratigraphical significance. [1919, inscribed 1917].
University of Texas Bulletin, 1762: 1-241, 11 pl.,  Austin,Texas.
Glenister & Furnish 1961 The Permian ammonoids of Australia.
Journal of Paleontology, 35 (4): 673-736, fig.1-17, pl.78-86; Tulsa,Oklahoma.
Liang 1982 Some Early Permian ammonoids from Jilin and Nei Monggol.
Acta Paleontologica Sinica, 21 (6): 645-658, fig.1-12, pl.1-3; Beijing.
Miller & Furnish 1940c Permian ammonoids of the Guadalupe Mountain Region and adjacent areas.
Special Papers of the Geological Society of America, 26: 1-242, fig.1-59, pl.1-44; Baltimore.
Plummer & Scott 1937 Upper Paleozoic ammonites in Texas.
The geology of Texas, vol.3 pt.1, Bull. Texas. Univ., 3701: 1-516, fig.1-88, pl.1-41; Austin, Texas.
Ruzhencev 1974 O semeystvakh Paragastrioceratidae i Spirolegoceratidae.
Paleontologicheskiy Zhurnal, 1974 (1): 19-29, fig.1-3, pl.1; Moskva.
Teichert & Glenister 1952 Lower Permian ammonoids from the Irwin Basin, Western Australia.
Journal of Paleontology., 26 (1): 12-23, fig.1-4, tab.1-6, pl.3-4; Tulsa,Oklahoma.
Zhou 1987 Early Permian ammonoid-fauna from southeastern Hunan. [In Chinese, with English abstract].
In: Nanjing Institute of Geology and Paleontology,Academia Sinica, ed.,Collection of Postgraduate Theses, 1: 285-348,33 fig., 9 pl. (Jiangsu Sci. and Technol.Publ.House), Nanjing