1. Separate Evolutionary Origins of Teeth from Evidence in Fossil Jawed Vertebrates
2. E. Stensiö, Palaeozool. Groenl.2, 5-622 (1948).
3. G. C. Young, Palaeontology27, 635 (1984).
4. W. Gross, Notizbl. Hess. Landesamt.Bodenforsch.91, 36 (1963).
5. E. Stensiö, in Traité de Paléontologie, J. Piveteau, Ed. (Masson, Paris, 1969), vol. 4:2, pp. 71–692.