1. American Cancer Society (2018, April 1), Retrieved from: https://www.cancer.org/cancer/liver-cancer/about/what-is-key-statistics.html.
2. Non-parametric probabilistic image segmentation. In computer vision, 2007. ICCV 2007;Andreetto,2007
3. Brain tumor detection and localization in magnetic resonance imaging;Azhari;International Journal of Information Technology Convergence and services,2014
4. Independent component analysis based on nonparametric density estimation;Boscolo;IEEE Transactions on Neural Networks,2004
5. Non-parametric image subtraction using grey level scattergrams;Bromiley;Image and Vision Computing,2002