1. Ali-Zade, A. A. (1972): Cretaceous belemnites of Azerbaidzhan. — Akad. Nauk Azerbaidzhan, geol. Inst., 279 pp. ‘Nedra’, Moscow. [In Russian]
2. Arkhangelsky, A. D. (1916): Upper Cretaceous deposits of Turkestan. — Mem. Com. Geol., 151, 98 pp., Petrograd. [In Russian]
3. Berggren, W. A. &Hollister, C. D. (1974): Paleogeography, paleobiogeography and the history of circulation in the Atlantic Ocean. [In:]Hay, W. W. (Ed.): Studies in paleooceanography. — Soc. Econ. Paleont. Miner, spec. Publ.,20, 95–186, Tulsa.
4. Birkelund, T. (1956): Upper Cretaceous belemnites of West Greenland. — Medd. Grønland137 (9), 28 pp., Copenhagen.
5. Birkelund, T. (1957): Upper Cretaceous belemnites from Denmark. — Biol. Skr. dan. Vid. Selsk.,9 (1), 69 pp., Copenhagen.