Bernd Mulansky, Jochen W. Schmidt, Marion Walther. Tensor Product Spline Interpolation subject to Piecewise Bilinear Lower and Upper Bounds. In Josef Hoschek, Panagiotis D. Kaklis, editors, Advanced Course on FAIRSHAPE. pages 201-216, Vieweg+Teubner, 1996. [doi]
Abstract is missing.