Mahmoud S. Sayed, Tamer A. A. Alzohairy , Emad El-Dein H. A. Masameer. 2018. “Medical Image Registration Based on Feed-Forward Neural Networks and Directional Discrete Cosine Transform”. International Journal of Engineering and Computer Science 5 (8). india. http://ijecs.in/index.php/ijecs/article/view/2363.