1. Three abietaceous cones from the Wealden of Belgium;Alvin;Mem. Inst. R. Sci. Nat. Belg.,1953
2. On Pseudoaraucaria Fliche emend., a genus of fossil pinaceous cones;Alvin;Ann. Bot., N.S.,1975
3. On the two cones Pseudoaraucaria heeri (Coemans) nov. comb., and Pityostrobus villerotensis nov. sp. from the Wealden of Belgium;Alvin;Mem. Inst. R. Sci. Nat. Belg.,1957
4. Further conifers of the Pinaceae from the Wealden Formation of Belgium;Alvin;Mem. Inst. R. Sci. Nat. Belg.,1960
5. A new species of abietaceous cone from the Lower Greensand of the Isle of Wight;Creber;Ann. Bot., N.S.,1956