Ken Museth David E. Breen Ross T. Whitaker Sean Mauch David Johnson Algorithms for Interactive Editing of Level Set Models. 821-841 2005 24 Comput. Graph. Forum 4 http://dx.doi.org/10.1111/j.1467-8659.2005.00904.x db/journals/cgf/cgf24.html#MusethBWMJ05