Raut, S. A. ., and M. . Zuber. “Identification of Brain Tumors Using a Combined Approach of Discrete Wavelet Transform and Principal Component Analysis”. International Journal of Intelligent Systems and Applications in Engineering, vol. 12, no. 2s, Oct. 2023, pp. 282-93, https://www.ijisae.org/index.php/IJISAE/article/view/3579.