Siyuan Wu, Jim Wang. Nonnegative matrix factorization: When data is not nonnegative. In Dong Xie, Ron Yang, Jinguang Sun, Lipo Wang, Xiaowei Hui, Ying Chen, editors, 7th International Conference on Biomedical Engineering and Informatics, BMEI 2014, Dalian, China, October 14-16, 2014. pages 227-231, IEEE, 2014. [doi]
Abstract is missing.