REFERENCES
- Calzavara , M. , Muscio , G. and Wild , R. 1980 . Melancosaurus preonensis N. G., N. Sp., a new reptile from the Norian of Friuli, Italy. . Gortania , 2 : 49 – 64 .
- Caple , G. , Balda , R. P. and Willis , W. R. 1983 . The physics of leaping animals and the evolution of preflight. . American Naturalist , 121 : 455 – 467 .
- Martin , L. D. 1983 . “ The origin and early radiation of birds ” . In Perspectives in Ornithology Edited by: Clark , A. H. and Clark , G. A. 291 – 338 . Cambridge : Cambridge University Press .
- Padian , K. 1983 . A functional analysis of flying and walking in pterosaurs. . Paleobiology , 9 : 218 – 239 .
- Tarsitano , S. and Hecht , M. K. 1980 . A reconsideration of the reptilian relationships of Archaeopteryx . Zoological Journal Linnean Society , 69 : 149 – 182 .
- Walker , A. D. 1972 . New light on the origin of birds and crocodiles. . Nature , 237 : 257 – 263 .
- Walker , A. D. 1977 . “ Evolution of the pelvis in birds and dinosaurs. ” . In Problems in Vertebrate Evolution Edited by: Andrews , S. M. , Miles , R. S. and Walker , A. D. 319 – 358 . New York : Academic .
- Walker , C. A. 1981 . New subclass of birds from the Cretaceous of South America. . Nature , 292 : 51 – 53 .
- Whetstone , K. N. and Martin , L. D. 1979 . New look at the origin of birds and crocodiles. . Nature , 279 : 234 – 236 .