[1]
N. I. Portenko, β€œOn integro-differential equations for distribution of probabilities of additive functionals of diffusion processes ”, Ukr. Mat. Zhurn., vol. 18, no. 5, pp. 60–68, Aug. 1966, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/8441