1. Bernard, J., and O. Leite, 2006, Multi-electrode resistivity imaging for environmental and mining applications, http://www.iris-instrument.com.
2. Capacitively coupled resistivity survey of the levee surrounding the Omaha Public Power District Nebraska City Power Plant, June 2011
3. SEISMIC VELOCITIES FROM SURFACE MEASUREMENTS
4. Dunbar, J. B., J. L. Llopis, G. L. Sills, E. W. Smith, R. D. Miller, J. Ivanov, and R. F. Corwin, 2007, Condition Assessment of Levees, U.S. Section of the International Boundary and Water Commission: Flood Simulation Study of Retamal Levee, Lower Rio Grande Valley, Texas, Using Seismic and Electrical Geophysical Models, U.S. Army Corps of Engineers, Engineer Research and Development Center.