CHAU, Le Khanh. An inequality for a quadratic functional. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 31, n. 3-4, p. 155 – 158, 2009. DOI: 10.15625/0866-7136/31/3-4/5644. Disponível em: https://vjmech.vast.vn/vjmech/article/view/5644. Acesso em: 8 nov. 2025.