Soji Yamakawa Kenji Shimada Converting a tetrahedral mesh to a prism-tetrahedral hybrid mesh for FEM accuracy and efficiency. 287-294 2008 Symposium on Solid and Physical Modeling http://doi.acm.org/10.1145/1364901.1364941 conf/sma/2008 db/conf/sma/spm2008.html#YamakawaS08