Authors Year Title
Bogoslovskaya 1986 Ammonoidei. In: Atlas kharakternykh kompleksov Permskoi fauny i flory Urala i Russkoi platformy.
Trudy, novaia seria, 331: 14-15, pl.37-59, (Nedra) Leningrad.
Bogoslovskaya 1990 Osnovye puti razvitiya i klassifikatsiya pozdnepaleozoyskikh ammonoidey Marathonitaceae i Cyclolobaceae.
Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 243: 70-86, fig.1-3; Moskva.
Chernov 1939 Otryad Ammonoidea. Ammonei.
Atlas rukovodyashchikh form iskopaemykh faun SSSR, 6, Permskaya sistema: 160-190, fig.39-103, pl.41-45; Leningrad, Moskva.
Davis 1972 Mature modifications and dimorphism in selected Late Paleozoic ammonoids.
Bulletins of American Paleontology, 62 (272): 27-130, pls.3-21, Ithaca, NY.
Kullmann & Wiedmann 1970 Significance of sutures in phylogeny of Ammonoidea.
University of Kansas, Paleontological Contributions, 47: 1-32, fig.1-16; Lawrence, Kansas.
Ruzhencev 1933 O nekotorykh nizhnepermskikh ammonoideyakh Aktyubinskogo rayona.
Byulleten' Moskovskaya obshchestva ispytatelei prirody, otdelenie geologii, 11 (2): 164-180, fig.1-6, pl.4; Moskva.
Ruzhencev 1938 Ammonei Sakmarskogo yarusa i ikh stratigraficheskoe znachenie.
Problemy Paleontologii, 4: 187-285, fig.1-19, pl.1-7; Moskva.
Ruzhencev 1950 Verkhnekamennougol'nye ammonity Urala.
Trudy Paleont. Inst., Akad. Nauk SSSR, 29: 1-220, fig.1-84, pl.1-15; Moskva.
Ruzhencev 1956 Nizhnepermskiye ammonity Yuzhnogo Urala. II. Ammonity Artinskogo yarusa.
Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 60: 1-275, fig.1-97, pl.1-39; Moskva.
Shigeta, Zakharov & Mapes 2001 Origin of the Ceratitida (Ammonoidea) inferred from the early internal shell features.
Paleontological Research, 5 (3): 201-213, 7 fig.
Zhao 1980 Origin, classification, evolution and distribution of the family Cyclolobidae.
Acta Paleontologica Sinica, 19 (2): 79-90, fig.1-5, tab.1-2; Beijing.