Dobushovskyy, M.S., and M.M. Sheremeta. “Analogues of Whittker’s Theorem for Laplace-Stieltjes Integrals”. Carpathian Mathematical Publications 8, no. 2 (December 30, 2016): 239–250. Accessed November 23, 2024. https://journals.pnu.edu.ua/index.php/cmp/article/view/1430.