Hongyan Guan, and Yan Hao. “Products of Toeplitz and Hankel Operators on the Harmonic Bergman Space”. International Journal of Mathematics And its Applications 5, no. 4 - E (December 15, 2017): 669–673. Accessed July 3, 2024. https://ijmaa.in/index.php/ijmaa/article/view/1325.