Batten, D. J.; Dutta, R. J.; Knobloch, E. (1996). Differentiation, affinities and palaeoenvironmental significance of the megaspores Arcellites and Bohemisporites in Wealden and other Cretaceous successions. Cretaceous Research. 17(1): 39-65.
Differentiation, affinities and palaeoenvironmental significance of the megaspores Arcellites and Bohemisporites in Wealden and other Cretaceous successions