Bolli, 1980
From dinoflaj3
Bolli, H.M., 1980: Calcisphaerulidae and Calpionellidae from the Upper Jurassic and Lower Cretaceous of D.S.D.P. Hole 416A, Moroccan Basin. In: Lancelot, Y. et al., Deep Sea Drilling Project, Washington, Initial Reports, v.50, p.525-543, pl.1-7.