1. “Speciation among tropical trees: Some deductions in the light of recent evidence.”;Ashton;Biol. J. Linn. Soc.,1969
2. Ashton, P. S. (1972). “The quaternary geomorphological history of western Malesia and lowland forest phytogeography.” pp. 35–62 In Ashton, P. and Ashton, M. (eds.), “Transactions of the second Aberdeen-Hull symposium on Malesian ecology: The quaternary era in Malesia.” Hull Geog. Dept. Misc. Ser. 13.
3. “Dipterocarp biology as a window to the understanding of tropical forest structure.”;Ashton;Ann. Rev. Ecol. Syst.,1988
4. Ashton, P. S. and colleagues (submitted). “Comparative ecological studies in the mixed Dipterocarp forests of northwestern Borneo. I: Patterns of floristic variation. III: Patterns of species richness.”
5. Ashton, P. S., Hall, P. and colleagues (submitted). “Ibid II: Variation in structure and dynamics.”