1. Engineering classification of rock masses for the design of tunnel support;Barton;Rock Mechanics,1974
2. A class of methods for solving nonlinear simultaneous equations;Broyden;Mathematics of Computation,1965
3. Numerical Analysis;Burden,1981
4. 2D resistivity surveying for environmental and engineering applications;Dahlin;First Break,1996
5. Resistivity pre-investigations for the Hallandsås railway tunnel, Sweden;Dahlin,1998