Udai Veer Singh, and Anupma Rastogi. “On Goldberg q$^{th}$ Order and Goldberg q$^{th}$ Type of an Entire Function Represented by Multiple Dirichlet Series”. International Journal of Mathematics And its Applications 3, no. 3 - D (November 15, 2015): 51–56. Accessed May 13, 2024. http://ijmaa.in/index.php/ijmaa/article/view/476.