S. Lacombe, E. Studicky, S. Frape and A. Unger, “Influence of Leaky Boreholes on Cross-Formational Ground Water Flow and Contaminant Transport,” Water Resources Research, Vol. 31, No. 8, 1995, pp. 1871-1882. doi:10.1029/95WR00661
 S. N. Sterling, B. L. Parker, J. A. Cherry, J. H. Williams, J. W. Lane Jr. and F. P. Haeni, “Vertical Cross Contamination of Trichloroethylene in a Borehole in Fractured Sandstone,” Ground Water, Vol. 43, No. 4, 2005, pp. 557-573. doi:10.1111/j.1745-6584.2005.0087.x
 M. Bonte, P. J. Stuyfzand, A. Hulsmann and P. Van Beelen, “Underground Thermal Energy Storage: Environmental Risks and Policy Developments in the Netherlands and European Union,” Ecology & Society, Vol. 16, No. 1, 2011, Article ID: 22.2011.
 J. Jiménez-Martínez, R. Aravena and L. Candela, “The Role of Leaky Boreholes in the Contamination of a Regional Confined Aquifer. A Case Study: The Campo De Cartagena Region, Spain,” Water Air Soil Pollution, Vol. 215, 2011, pp. 311-327. doi:10.1007/s11270-010-0480-3
 B. L. Morris, A. R. L. Lawrence, P. J. C. Chilton, B. Adams, R. C. Calow and B. A. Klinck, “Groundwater and Its Susceptibility to Degradation: A Global Assessment of the Problem and Options for Management,” Early Warning and Assessment Report Series, RS. 03-3, United Nations Environment Programme, Nairobi, 2003.
 M. K. Landon, B. C. Jurgens, B. G. Katz, S. M. Eberts, K. R. Burow and C. A. Crandall, “Depth-Dependent Sampling to Identify Short-Circuit Pathways to Public-Supply Wells in Multiple Aquifer Settings in the United States,” Hydrogeology Journal, Vol. 18, 2010, pp. 51-68. doi:10.1007/s10040-009-0531-2
 R. Chesnaux, “Sealing Pumping Wells and Protecting Groundwater Resources – Detecting and Characterizing Defective Well Seal to Prevent Hydraulic Short-Circuits between Aquifers [in French],” Presses Universitaires Européennes, 2010.
 D. Meiri, “A Tracer Test for Detecting Cross-Contamin- ation along a Monitoring Well Column,” Ground Water Monitoring Review, Vol. 9, No. 2, 1989, pp. 78-81. doi:10.1111/j.1745-6592.1989.tb01142.x
 R. Chesnaux, and R. P. Chapuis, “Detecting and Quantifying Leakage through Defective Borehole Seals: A New Methodology and Laboratory Verification,” Geotechnical Testing Journal, Vol. 30, No. 1, 2007, pp. 17-24.
 M. Zhang and S. Bachu, “Review of Integrity of Existing Wells in Relation to CO2 Geological Storage: What Do We Know?” International Journal of Greenhouse Gas Control, Vol. 5, 2011, pp. 826-840. doi:10.1016/j.ijggc.2010.11.006
 Walkerton Inquiry, “Report of the Walkerton Inquiry, Part 1: The Events of May 2000 and Related Issues,” 2002. http://www.walkertoninquiry.com
 L. Aller, T. Bennett, J. H. Lehr, R. J. Petty and G. Hackett, “DRASTIC: A Standardized System for Evaluating Gro- undwater Pollution Potential Using Hydrogeologic Setting,” US Environmental Protection Agency Rep EPA/ 600/2-87/035, 1987.
 R. Chesnaux, M. Lambert, U. Fillastre, J. Walter, M. Hay, A. Rouleau, R. Daigneault, D. Germaneau and A. Moisan, “Building a Geodatabase for Mapping Hydrogeological Features and 3D Modeling of Groundwater Systems: Application to the Saguenay-Lac-St-Jean Region, Canada,” Computers & Geosciences, Vol. 37, 2011, pp. 1870-1882. doi:10.1016/j.cageo.2011.04.013