1. A C1 monotonicity preserving surface interpolation scheme;Asaturyan,1988
2. Monotonicity preserving surface interpolation;Beatson;SIAM J. Num. Anal.,1985
3. A survey of curves and surfaces methods in CAGD;Böhm;Computer Aided Geometric Desing,1984
4. Monotone piecewise bicubic interpolation;Carlson;SIAM J. Num. Anal.,1985
5. Shape-preserving interpolation by bivariate C1 quadratic splines;Chui,1993