Agulov,A.P. (1970)
Spore and pollen complexes of Middle and Upper Miocene deposits North of the Black Sea Basin [ Sporovo-pyltsevye kompleksy Sredne-Verkhnemiotsenovykh otlozhenii Ppichernomorskoi Vpadinya ] Izvestiya Vysshikh Uchebnykh Zavedenii. Geologiya i Razvedka
Vol. 1970 # 9 P. 42- 46