@article {berk2006occurrence,
	title = {Occurrence of infected amoebae in cooling towers compared with natural aquatic environments: implications for emerging pathogens},
	journal = {Environmental science \& technology},
	volume = {40},
	number = {23},
	year = {2006},
	pages = {7440{\textendash}7444},
	publisher = {ACS Publications},
	author = {Berk, SG and Gunderson, JH and Newsome, AL and Farone, AL and Hayes, BJ and Redding, KS and Uddin, N and Williams, EL and Johnson, RA and Farsian, M and others}
}
