Visscher, H. 1993. 37th Professor sir AC. Seward Memorial Lecture: Links with the past in the plant world: cuticles as recorders of diversity, kerogen formation and palaeoatmospheric CO2 level. Journal of Palaeosciences. 42, 1-3 (Dec. 1993), 86–92. DOI:https://doi.org/10.54991/jop.1993.1134.