1. A Primer of Nonlinear Analysis;Ambrosetti,1993
2. Finite Elements: Theory;Braess,2001
3. Mathematical Analysis and Numerical Methods for Science and Technology;Dautray,1988
4. Mathematical Analysis and Numerical Methods for Science and Technology;Dautray,1992
5. Smoothing seismic tomograms with alpha-trimmed means;Gersztenkorn;Geophysical Journal,1988