ANH, Nguyen Dong; HAI, Ninh Quang; SCHIEHLEN, Werner. Extended averaged equation method and application on analyzing some nonlinear deterministic vibrations. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 31, n. 1, p. 1–16, 2009. DOI: 10.15625/0866-7136/31/1/5490. Disponível em: https://vjmech.vast.vn/vjmech/article/view/5490. Acesso em: 8 nov. 2025.