1. An algorithm for the integration of unequally spaced data;Gill;Comput. J.,1972
2. Signal extraction approach to nonlinear regression and spline smoothing;Wecker;J. Amer. Statist. Assoc.,1983
3. Improper priors, spline smoothing and the problem of guarding against model errors in regression;Wahba;J. R. Statist. Assoc.,1978
4. Probability and Measure;Billingsley,1986
5. On algorithms for generalised smoothing splines;Osborne;J. Austral. Math. Soc.,1988