Wan Chuanbiao et al., 1995
From dinoflaj3
Wan Chuanbiao, Yan Fengyun and Yin Nan, 1995: Early Cretaceous dinoflagellates and other algae from Jixian, Heilongjiang. Acta Micropalaeontologica Sinica, v.12, no.1, p.51-62, pl.1-3. (In Chinese with English summary.)