1. Clokie, M. R. J., Millard, A. D., Letarov, A. V., and Heaphy, S. (2011) Phages in nature, Bacteriophage, 1, 31-45.
2. Díaz-Muñoz, S. L., and Koskella, B. (2014) Bacteriaphage interactions in natural environments, in Advances in Applied Microbiology, Elsevier, Vol. 89, pp. 135-183.
3. Batinovic, S., Wassef, F., Knowler, S. A., Rice, D. T. F., Stanton, C. R., et al. (2019) Bacteriophages in natural and artificial environments, Pathogens, 8, 100.
4. Wommack, K. E., and Colwell, R. R. (2000) Virioplankton: viruses in aquatic ecosystems, Microbiol. Mol. Biol. Rev., 64, 69-114.
5. Parikka, K. J., Le Romancer, M., Wauters, N., and Jacquet, S. (2017) Deciphering the virus-to-prokaryote ratio (VPR): insights into virus-host relationships in a variety of ecosystems, Biol. Rev., 92, 1081-1100.