1. http://www.ncbi.nlm.nih.gov
2. CHAPTERS 1 AND 2
3. The case for biocentric microbiology;Aziz;Gut,2009
4. Cell evolution and earth history: stasis and revolution;Cavalier-Smith;Philos Trans R Soc Lond B Biol Sci,2006
5. Predation between prokaryotes and the origin of eukaryotes;Davidov;Bioes-says,2009