1. Andrews, C. 1988. Personal communication, London Zoo.
2. On the function of the two types of myotomal muscle fibre in elastmobranch fish;Bone;J. mar. biol. Assoc. UK,1966
3. Locomotor muscle;Bone,1978
4. A study of the Notochord, Musculature and Nervous System of the tail of Xenopus laevis (Daudin, 1802) with particular reference to the flickering movement;Dalooi,1977
5. Metamorphosis;Etkin,1964