1. Fractures and faults at Chalk River, Ontario;Brown,1989
2. VLF ground surveys, a powerful tool for study of shallow two-dimensional structures;Fischer;Geophys. Prospect.,1983
3. A portable local loop VLF transmitter for geological fracture mapping;Hayles;Geophys. Prospect.,1986
4. Numerical VLF modeling;Kaikkonen;Geophys. Prospect.,1979
5. Numerical finite element modeling in geophysical applications of electromagnetic fields;Kaikkonen,1980