Ullah, I. ., Iqbal, S., Sarwar, F., & Rehman, A. . . (2019). N-dimensional Fractional Fourier Transform and its Eigenvalues and Eigenfunctions. American Scientific Research Journal for Engineering, Technology, and Sciences, 62(1), 210–214. Retrieved from https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/5494