NGUYEN, Anh Phong; NGUYEN, Anh Vu; HO, Thi Hong Minh; TO, Thi Thanh Truc. Diversification of business and technical efficiency of companies in Vietnam. Journal of Eastern European and Central Asian Research (JEECAR), [S. l.], v. 8, n. 4, p. 481–494, 2021. DOI: 10.15549/jeecar.v8i4.772. Disponível em: https://www.ieeca.org/journal/index.php/JEECAR/article/view/772. Acesso em: 5 may. 2024.