Grishina and Klenina, 1981
From dinoflaj2
Grishina, T.S. and Klenina, L.N., 1981: Akritarkhi iz zony Cyrtograptus lundgreni zaisanskoi skladchatoi sistemy. Khabarpary Izvestiya Akademii Nauk Kazakhskoi SSR, Seriya Geologicheskaya, Izdatelstvo Nauka, Kazakhskoi Alma-Ata, no.1, p.26-34.
