TRAN, Minh Tuan; NGUYEN, Minh Ngoc. Proportional Topology Optimization algorithm with virtual elements for multi-material problems considering mass and cost constraints. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 45, n. 4, p. 334–357, 2023. DOI: 10.15625/0866-7136/19613. Disponível em: https://vjmech.vast.vn/vjmech/article/view/19613. Acesso em: 9 nov. 2025.