@article{Wang_homotopy, title = "A homotopy-based sparse representation for fast and accurate shape prior modeling in liver surgical planning ", journal = "Medical Image Analysis ", volume = "19", number = "1", pages = "176 - 186", year = "2015", author = "Guotai Wang and Shaoting Zhang and Hongzhi Xie and Dimitris N. Metaxas and Lixu Gu", }