Achak, Azzedine, Radouan Daher, and Najat Safouane. “Titchmarsh Theorems and K-Functionals for the Two-Sided Quaternion Fourier Transform”. International Journal of Engineering and Applied Physics 1, no. 1 (January 25, 2021): 26–37. Accessed December 21, 2024. https://ijeap.org/ijeap/article/view/2.