PHUC, Nguyen Thien. Planetary cycloid roller gear reducer. <b>Vietnam Journal of Mechanics</b>, Hanoi, Vietnam, v. 24, n. 2, p. 115–122, 2002. DOI: 10.15625/0866-7136/24/2/6613. Disponível em: https://vjmech.vast.vn/vjmech/article/view/6613. Acesso em: 8 nov. 2025.