Template:Ippolitov & Gulyaev, 2013a
- Ippolitov, A. P. & Gulyaev, D.B. 2013. Applying of infrazonal stratigraphy concept to belemnites: case study of Lower Callovian in CHP-5 section (Saratov, European Russia). Paleostrat-2013. Annual meeting (scientific conference) of the Paleontological section of MOIP and Moscow Branch of the Paleontological Society at RAS. Moscow, 28-30 January 2013. Program and abstracts. Alekseev A.S. (ed.). Moscow: PIN RAS. pp. 34–35. Volume PDF