Helicoprion (Parahelicoprion) clerci. (In Russian) Zap. Ural'skogo Obschestva Ljubitelej Estestvoznanija v gorode Sverdlovske, 39, p. 1–10.(In Russian.)
Helicoprion ivanovi n. sp. (In Russian) Bulletin de l'Académie des Sciences de Russie, 6. Sér., 16, 369–378
Remarks on the tooth segments of Edestidae and their orientation. (In Russian) Bulletin de l'Académie des Sciences de Russie, 6. Sér., 16, 379–388
On a new species of Helicoprion (Helicoprion clerci, n. sp.). (In Russian) Bulletin de l'Académie Impériale des Sciences de Saint Pétersbourg, 6. Sér., 10(9), 701–708
Notes on Helicoprion and other edestids. (In Russian) Izvestiya Imperatorskoy Akademii Nauk, 5: 1105–1122
Ueber die Reste von Edestiden und die neue Gattung Helicoprion. Verhdlungen der Kaiserlichen Russischen Mineralogischen Gesesllschaft zu St. Petersburg, 36(2): 1–111
