A Sparse Non-Negative Matrix Factorization Framework for Identifying Functional Units of Tongue Behavior From MRI. - Jonghye Woo; Jerry L. Prince; Maureen Stone 001; Fangxu Xing; Arnold D. Gomez; Jordan R. Green; Christopher J. Hartnick; Thomas J. Brady; Timothy G. Reese; Van J. Wedeen; Georges El Fakhri (IEEE Trans. Medical Imaging, 2019)