Department of Geology University of Stockholm and section of Palaeozoology, Swedish Museum of Natural History, 3-113.
Chang M.-M., Yu X. (1984). Structure and phylogenetic significance of Diabolichthys speratus gen. et sp. nov., a new dipnoan-like form from the Lower Devonian of Eastern Yunnan, China. Proc. Linn. Soc. N. S. W., 107, 171-184.
Compagno L.J. V. (1979). Coelacanths: Shark relatives or bony fishes? In: J. E. McCosker and M. D. Lagios (eds.), The biology and physiology of the living coelacanth, Calif. Acad. Sci. Occ. Papers, 134, 45-55.
Denison R.H. (1968a). Early Devonian lungfishes from Wyoming. Utah and Idaho. Fieldiana: Geol., 17, 353-413.
Denison R.H. (1968b). The evolutionary significance of the earliest known lungfish. Uranolophus. Nobel. Symp. No. 4, 247-257.
Denison R.H. (1974). The structure and evolution of teeth in lungfishes. Fieldiana: Geol., 33, 31-58.
Gregory W.K. (1951). Evolution Emerging. Macmillan, New York.
Holmes E. В. (1985). Are lungfishes the sister group of tetra- pods? Biol. J. Linn. Soc., 25 (4), 379-397.
Jarvik E. (1942). On the structure of the snout of crossopterygians and lower gnathostomes in general. Zool. Bidr. Uppsala, 21, 235-675.
Jarvik E. (1963). The composition of the intermandibular division of the head in fish and tetrapods and the diphyletic origin of the tetrapod tongue. Kungliga Svenska Vetenskapsakademiens Handlingar, 9, 1-74.
Jarvik E. (1968). The systematic position of the Dipnoi. Nobel Symp. No. 4, 223-245.
Jarvik E. (1972). Middle and Upper Devonian Porolepiformes from East Greenland with special reference to Glyptolepis groenlandica n. sp. Meddelelser om Grgfaland, 187, 1-178.
Jarvik Е. (1980). Basic Structure and Evolution of Vertebrates.
Academic Press, London. Jessen H. (1966). Struniiformes. In: J. P. Lehman (ed.), Traite de Paleontologie, Tome 4, Vol. 3, 387-398, Masson S.A. Paris.
Jessen H. (1980). Lower Devonian Porolepiformes from the Canadian Arctic with special reference to Powichthys thorsteinssoni Jessen.