References
- Beale , E.M.L. 1970 . “ Computational methods for least squares ” . In Integer and Non-linear Programming , Edited by: Cadie , J.A. North Holland Publishing . Chapter 9
- CALCOMP . 1971 . GPCP User's Manual
- Schagen , I.P. 1979 . Interpolation in two dimensions-a new technique . J. Inst, Maths. Applics , 23 : 53 – 59 .
- Schvidler , M.I. 1964 . Filtration Flows in Heterogeneous Media , New York : Consultants Bureau . translated from the Russian