1. A two-dimensional interpolation function for irregularly-spaced data;Shepard,1968
2. Combined Shepard univariate operators;Coman;East J. Approx.,2001
3. Shepard’s method of “metric interpolation” to bivariate and multivariate interpolation;Gordon;Math. Comp.,1978
4. Representation and approximation of surfaces;Barnhill,1977
5. Rate of convergence of Shepard’s global interpolation formula;Farwig;Math. Comp.,1986