1. Atkinson, B.; Black, G.; Lewis, P. and Pinches, A. (1979) Biological particles of given size, shape and density for use in biological reactors. Biotechnol. Bioeng. 21: 193–200.
2. Cooper, P.F.; Walker, 1.; Crabtree, H.E. and Aldred, R.P. (1986) Evaluation of the CAPTOR@ process for uprating an overloaded sewage works. In: Webb, C.; Black, G.M. and Atkinson, B. (Eds.), Process Engineering Aspects of Immobilised Cell Systems, The Institution of Chemical Engineers, Rugby, UK, ISBN 0 85295 196 5, pp. 205–217.
3. Gotta, P.S.; Reddy, M.P.; Simms, M.K. and Laken, T.J. (1994) Three years of full-scale Captor@ process operating at Moundsville WWTP, Water Sci. Technol. 29: 175–181.
4. http://www.linde-anlagenbau.de /en
5. http://www.kaldnes.com