Aricapa Giraldo, Héctor Jaime ; Pérez Cárdenas, Jorge Enrique ; Benavides, Diego. CASTILLO, G; THIERS, R and CASTILLO, J. Evaluation of the Coliphage Procedure and Presence / Absence Test as Simple Rapid Economical Methods for Screeening Potable Water Source and Potable Water Supplies in Chile [online]. [Ottawa, Canadá]: International Development Research Centre (IDRC), 1997. rev. 10 november 1998. Available: reference@idrc.ca.
,
2005