1. Some British Wealden megaspores and their facies distribution;Batten;Paleontology,1969
2. Revision of S.J. Dijkstra's Late Cretaceous megaspores and other plant microfossils from Limburg, The Netherlands;Batten;Meded. Rijks Geol. Dienst,1988
3. Catalog of Mesozoic and Tertiary megaspores;Batten;Am. Assoc. Stratigr. Palynol. Contrib. Ser.,1990
4. Two new megaspore species from the continental Upper Cretaceous (Campanian-Maestrichtian) of the Alberta Plains;Campbell;Can. J. Bot.,1972
5. Diversification of modern heterosporous pteridophytes;Collinson,1991