Celico, F., Petrella, E., Allocca, V., Marotta, S., Nerone, V., Marzullo, G. and Naclerio, G. (2008) “Protection of carbonate aquifers against microbial pollution”, Italian journal of engineering geology and environment, pp. 57–65. doi: 10.4408/IJEGE.2008-01.S-04.