Minh DT, Binh DTT, Lien NT. Theoretical overview of the innovation system for service sector: some remarks of research methodology. J. Sci. Tech. Policy Manage. [Internet]. 2020 Jun. 19 [cited 2026 Sep. 18];9(1):55-72. Available from: https://vietnamstijournal.net/index.php/JSTPM/article/view/324