Popov, E.V. & Yarkov, A.A. (2001)
A new giant species of Edaphodon (Holocephali; Edaphodontidae) from the Beryozovaya Beds (lower Paleocene) of the Volgograd Volga region. Paleontological Journal, 35, 183–187
Yarkov, A.A. & Popov, E.V. (1998)
Chondrichthyan fishes from the Beriozovaya beds (Lower Paleocene) of the Volgograd Volga River Basin and problems of evolution of the group near the Cretaceous-Paleogene boundary [Abstract]. "Geology and mineral resources from the South–East of Russian Platform": Abstracts of the International Scientific conference, Saratov: NV NIIGG, P 60–61. [In Russian]
Yarkov, A.A. & Popov, E.V. (1998)
A new chondrichthyan fauna from the Beriozovaya beds (Lower Paleocene) of the Volgograd Volga River Basin: preliminary data. (in Russian) Vopr. paleontologii i stratigrafii, 1998(1): 59–65