Corsetti, Matthew, and Ernest Fokoué. “Nonnegative Matrix Factorization With Toeplitz Penalty”. Journal of Informatics and Mathematical Sciences 10, no. 1-2 (August 9, 2018): 201–215. Accessed April 27, 2024. https://www.rgnpublications.com/journals/index.php/jims/article/view/851.