DU, Nguyen Huu. Optimal control problem for difusion processes with long run average cost per unit times. VNU Journal of Science: Natural Sciences and Technology, [S.l.], v. 12, n. 2, june 1996. ISSN 2588-1140. Available at: <https://js.vnu.edu.vn/NST/article/view/4091>. Date accessed: 22 nov. 2024.