Truong, Oanh Thi Hoang, Tien Trung Nguyen, and Truc Thanh Vo. “A Bibliometric Review of Service Innovation: Constituting Research Themes”. Ho Chi Minh City Open University Journal of Science - Economics and Business Administration 14, no. 3 (October 24, 2023): 77–93. Accessed October 14, 2026. https://journalofscience.ou.edu.vn/index.php/econ-en/article/view/2644.