1. A mixed primal–dual bases algorithm for regression under inequality constraints. Application to convex regression;Fraser;Scand. J. Statist,1989
2. Robertson, T., Wright, F.T., Dykstra, R.L., 1988. Order Restricted Statistical Inference. Wiley, New York.
3. Rockafellar, R.T., 1970. Convex Analysis. Princeton University Press, New Jersey.
4. Some aspects of the spline smoothing approach to nonparametric regression curve fitting;Silverman;J. Roy. Statist. Soc. B.,1985
5. Wahba, G., 1990. Spline Models for Observational Data, CMBS-NSF Regional Conference Series in Applied Mathematics.