Maslov, 1956
From dinoflaj2
Maslov, V.P., 1956: 3. Hystrichosphaera-spory, tsisty ili rastitelnye organizmy? In: Iskopaemye Izvestkovye Vodorosli SSSR; Akademiya Nauk SSSR, Institut Geologicheskikh Nauk, Moscow, Trudy, no.160, p.258-264, pl.86.
