1. Whittington, H.B. & Briggs, D.E.G. Phil. Trans. R. Soc. B309, 569–609 (1985).
2. Bruton, D.L. Phil. Trans. R. Soc. B295, 619–653 (1981).
3. Conway Morris, S. et al. Univ. Kansas paleont. Contr. 122, (1988).
4. Dennenberg, V.H. in Laterality and Psychopathology (eds Flor-Henry, P. & Gruzelier, J.) 29–38 (Elsevier, Amsterdam, 1983).
5. Bryden, M.P. Laterality: Functional Asymmetry in the Intact Brain (Academic, New York, 1982).