Saifeng Ni Zichun Zhong Yang Liu 0014 Wenping Wang Zhonggui Chen Xiaohu Guo Sliver-suppressing tetrahedral mesh optimization with gradient-based shape matching energy. 247-261 2017 52 Comput. Aided Geom. Des. https://doi.org/10.1016/j.cagd.2017.02.004 db/journals/cagd/cagd52.html#NiZLWCG17