1. Ayers, R.C., Sauer, T.C., and Anderson, P.W. (1985) The generic mud concept for NPDES permitting of offshore drilling discharges. Journal of Petroleum Technology, March, 475.
2. Dunn, H.E. and Beardmore, D.H. (1989) Status report: Gulf of Mexico, mud toxicity limitations. Petroleum Engineer International, October.
3. Clark, R.K. (1994) Impact of environmental regulations on drilling-fluid technology. Journal of Petroleum Technology, September, 804–9.
4. Jones, R.D. et al. (1983) The development and performance of a nontoxic oil mud. Drilling, April.
5. Clark, R.K. et al. (1976) Polyacrylamide/potassium chloride mud for drilling water-sensitive shales. Journal of Petroleum Technology, June, 719; also in Transactions AIME, 261.