Wan Chuanbiao et al., 1997
From dinoflaj3
Wan Chuanbiao, Qiao Xiuyun, Wang Renhou and He Chengquan, 1997: Cretaceous nonmarine microphytoplankton from the Hongqi Depression in the Hailar Basin, NE China. Acta Micropalaeontologica Sinica, v.14, no.4, p.405-418, pl.1. (In Chinese with English summary.)