Expression of Concern: Active Techniques of Heat Transfer Enhancement: A review. Babylonian Journal of Mechanical Engineering, [S. l.], v. 2026, p. 2–2, 2026. DOI: 10.58496/BJME/2026/002. Disponível em: https://journals.mesopotamian.press/index.php/BJME/article/view/1064. Acesso em: 7 mar. 2026.