1. Dosso, S.E., and Oldenburg, D.W., 1989, Linear and non-linear appraisal using extremal models of bounded variation, Geophys. J. Int.
2. Ellis, R.G., and Shekhtman, R., 1994, ABFOR3D and ABINV3D: Programs for forward and inverse modelling of Airborne EM Data: JACI 1994 Ann. Rep., Dept. Geophysics and Astronomy, Univ. of British Columbia.
3. Macnae., J., Osmakoff, A., Blaha, A., King, A., and Stolz, N., 1998, Fast Approximate AEM Data Processing: Exploration Geophysics (this volume).
4. Tikhonov, A.N., and Arsenin, Y.Y., 1977, Solution of Ill-posed Problems: John Wiley and Sons.