1. Cross, T. and Attwell, R. W. (1975) “Actinomycete spores”, in Spores VI (ed. P. Gerdhardt, R. N. Costilow and H. L. Sadoff), American Society for Microbiology, Washington, 3–14.
2. Doi, R. H. (1977a) “Genetic control of sporulation”, Ann. Rev. Genet., 11, 29–48.
3. Doi, R. H. (1977b) “Role of ribonucleic acid polymerases in gene selection in prokaryotes”, Bad. Rev., 41, 568–594.
4. Doi, R. H. and Leighton, T. J. (1972) “Regulation during initiation and subsequent stages of bacterial sporulation”, in Spores V (ed. H. O. Halvorson, R. Hanson and L. L. Campbell), American Society for Microbiology, Washington, 225–232.
5. Dunn, G., Jeffs, P., Mann, N. H., Torgensen, D. M. and Young, M. (1978) “The relationship between DNA replication and the induction of sporulation in Bacillus subtilus”, J. Gen. Microbiol, 108, 189–195.