1. A species of compressed lycopod sporophyll from the Upper Coal Measures of Somerset;Boulter M. C.;Palaeontology,1968
2. A system of group names for some Tertiary pollen;Boulter M. C.;Palaeontology,1977
3. SYSTEMATIC BOTANY ‐ AN UNENDING SYNTHESIS
4. Chapter 16 Patterns of Evolution in Early Angiosperms
5. Suggestions for the classification of fossil and Recent pollen grains and spores;Erdtman G.;Svensk Bot. Tids.,1947