NGUYEN, Xuan Viet Nhan. BI-LIPSCHITZ CONTACT INVARIANCE OF RANK. Dalat University Journal of Science, Dalat, Vietnam, v. 12, n. 2, p. 40–47, 2022. DOI: 10.37569/DalatUniversity.12.2.886(2022). Disponível em: https://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/886.. Acesso em: 30 nov. 2023.