1. Aston, R.J., 1966, Temperature relations, respiration and burrowing in Branchiura sowerbyi Beddard (Tubificidae, Oligochaeta). PhD. thesis, Univ. Reading, U.K.
2. Aston, R.J., 1968, The effect of temperature on life cycle, growth and fecundity of Branchiura sowerbyi (Oligochaeta, Tubificidae) J. Zool. Lond., 154:29–40.
3. Berrie, A.D., 1972, Productivity of the River Thames at Reading. Symp. Zool. Soc. Lond., 29:69–86.
4. Brinkhurst, R.O., 1970, Distribution and abundance of tubificid (Oligochaeta) species in Toronto Harbour, Lake Ontario. J. Fish. Res. Bd. Canada,27: 1961–1969.
5. Brinkhurst, R.O., and M.J. Austin, 1979, Assímilation by aquatic Oligochaeta. Int. Revue ges. Hydrobiol., 63:863–868.