Yutaka Ohtake Alexander G. Belyaev Hans-Peter Seidel 3D scattered data interpolation and approximation with multilevel compactly supported RBFs. 150-165 2005 67 Graphical Models 3 http://dx.doi.org/10.1016/j.gmod.2004.06.003 db/journals/cvgip/cvgip67.html#OhtakeBS05