1. Collatz, L., Quade, W.: Zur Interpolationstheorie der reellen periodischen Funktionen. Sitzungsber. Preuss. Akad. Wiss., 30, 383–429 (1938)
2. Schoenberg, I.J.: Contribution to the problem of application of equidistant data by analytic functions. Quart. Appl. Math., 4, 45–99, 112–141 (1946)
3. Wang, R. H.: The structural characterization and interpolation for multivariate splines. Acta Mathematica Sinica, 18, 91–106 (1975); Acta Mathematica Sinica, 18, 10–39 (1975) (English transl.)
4. Dahmen, W., Micchelli, C. A.: Recent progress in multivariate splines. In: Approximation Theory IV (Chui, C. K., Schumaker, L. L. and Ward, I. J. eds.), Academic, New York, 1983, 27–121
5. De Boor, C., Höllig, K., Riemenschneider, S.: Box Splines, Springer-Verlag, New York, Inc., 1993