1. On the regularization of incorrectly posed problems;Tikhonov;Dokl. Akad. Nauk SSSR,1963
2. The restoration of a function and its derivatives on the basis of experimental data;Demidovich,1967
3. Numerical differentiation and regularization;Cullum;SIAM. J. Numer. Anal.,1967
4. Theory of splines and their applications;Ahlberg,1967
5. Smoothing by spline functions;Reinsh;Numer. Math.,1967