@inbook{12516, author = {Nils Fremming and {\O}yvind Hjelle and Christian Tarrou}, title = {Surface Modelling From Scattered Geological Data}, year = {1997}, journal = {Numerical Methods and Software Tools in Industrial Mathematics}, pages = {305-320}, publisher = {Birkh{\"a}user}, editor = {M. D{\ae}hlen and Aslak Tveito}, }