1. Mangum, C. (1976) In Adaptations to Environment: Physiology of Marine Animals, ed. P.C. Newell, 191–278. London: Butterworth’s.
2. Weber, R.E. (1978) In Physiology of Annelids, ed. P.J. Mill, 393–445. London: Academic Press.
3. Chung, M.C.C. and Ellerton, H.D. (1979) Prog. Biophys. Mol. Biol. 35: 51–102.
4. Vinogradov, S.N., Shlom, J.M., Kapp, O.H. and Frossard, P. (1980) Comp. Biochem. Physiol. 67B: 1–16.
5. Vinogradov, S.N. (1985) Comp. Biochem. Physiol. 82B: 1–15.