1. Crawford, P. B. (1961),Producers Monthly 25, 10–11.
2. Crawford, P. B. (1962),Producers Monthly 26, 12.
3. Jack, T. R., Thompson, B. G., and Diblasio, E. (1983),Proceedings of the 1982 International Conference on Microbial Enhancement of Oil Recovery, Bartlesville, Oklahoma: US Department of Energy, pp. 88–93.
4. Jenneman, G. E., Knapp, R. M., McInerney, M. J., Menzie, D. E., and Revus, D. E. (1984),Soc. Petrol. Eng. J. Feb., 33–37.
5. Raiders, R. A., McInerney, M. J., Revus, D. E., Torbati, H. M., and Knapp, R. M. (1986),J. Ind. Microbiol. 1, 195–203.