1. SEM imaging of bacteria and nannobacteria in carbonate sediments and rocks;Folk;J. Sediment. Petrol.,1993
2. Interaction between bacteria, nannobacteria, and mineral precipitation in hot springs of central Italy;Folk;Geogr. Phys. Quat.,1994
3. Folk, R.L., 1997. Nannobacteria: surely not figments but what under heaven are they? naturalScience v. 1, article 3, http://naturalSCIENCE.com
4. Folk, R.L., 1998. Nannobacteria in the natural environment and in medicine. Alpe Adria Microbiol. J. 7, 87–95.
5. Folk, R.L., Chafetz, H.S., in press. Bacterially induced microscale and nannoscale carbonate precipitates. In: Riding, R., Awramik, S. (Eds.), Microbial Sediments. Springer, Berlin.