Team, Support. “A Generalization of the Fourier Transform of Ultrahyperbolic Operator: Manuel A. Aguirre”. Thai Journal of Mathematics 11, no. 3 (December 1, 2013): 499–518. Accessed May 1, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/394.