Shujun Fu and  Qiuqi Ruan and  Wenqia Wang and  Yu Li,  Feature Preserving Nonlinear Diffusion for Ultrasonic Image Denoising and Edge Enhancement .   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2007, vol. 2(2). 449 - 452
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/15953.