1. Length of day in the climates of past geological eras and its possible effects upon changes in plant life;Allard,1948
2. A new Mesozoic flora from Tico, Santa Cruz Province, Argentina;Archangelsky;Bull. Br. Mus. Nat. Hist., Geol.,1963
3. Cretaceous dinosaur extinction;Axelrod;Evolution,1968
4. Mesozoic floras;Barnard;Spec. Pap. Palaeontol.,1973
5. Palaeogeography, 180 million years ago to the present;Barron;Eclogae Geol. Helv.,1981