ANH, N. D. Dual approach to averaged values of functions. Vietnam Journal of Mechanics, Hanoi, Vietnam, v. 34, n. 3, p. 211–214, 2012. DOI: 10.15625/0866-7136/34/3/2361. Disponível em: https://vjs.ac.vn/index.php/vjmech/article/view/2361. Acesso em: 3 may. 2024.