1. Altbach, P.G.: The globalization of college and university rankings. Change Mag. High. Learn. 44(1), 26–31 (2012)
2. Altbach, P.G.: The dilemmas of ranking. Int. High. Educ. 42, 2–3 (2006)
3. Suwartha, N., Mohammed Ali Berawi, M.A.: The role of UI Greemetric as a global sustainable ranking for higher education institutions. Int. J. Technol. 10(5), 862–865, 862–863 (2019). ISSN 2086-9614
4. The 17 sustainable development objectives. Blogs and news Save the Children. https://www.savethechildren.it/blog-notizie/i-17-obiettivi-di-sviluppo-sostenibile?utm_source=google&utm_medium=grants&utm_campaign=cmpntvblog&causale=14400&gclid=EAIaIQobChMI5NnD7a76AIVhc13Ch0LHQnnEAAYASAAEgJt3fD_BwE
5. Guideline Ul GreenMetric World University Rankings 2019: Sustainable University in a Changing World: Lessons, Challenges and Opportunities. http://greenmetric.ui.ac.id/guidelines-page/