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):86-92. https://doi.org/10.54991/jop.1993.1134.