A Study of Operational Research Challenges: Exploring and addressing challenges in operational research. Journal of Advances and Scholarly Researches in Allied Education, [S. l.], v. 18, n. 6, p. 463–467, 2021. Disponível em: https://www.ignited.in/index.php/jasrae/article/view/13586. Acesso em: 13 june. 2026.