Solomko, A.V. “Operator Representation of Gevrey Ultradistributions Algebra With Supports on Positive $n$-Dimensional Angle”. Carpathian Mathematical Publications 1, no. 2 (December 30, 2009): 197–206. Accessed January 18, 2025. https://personnel.pnu.edu.ua/index.php/cmp/article/view/4015.