Larra, Jhon Dave, Danisse M. Barrera, Lovelyn J. Bayadas, Christian A. Ellipse, Reyden D. Lumanas, Josh Railey R. Valdez, and Faith Celeste B. Ole. “Evaluation of Project GTR (Gravitational Teaching Resource) As an Instructional Material for the General Theory of Relativity”. Journal of Research in Education and Pedagogy 3, no. 3 (August 3, 2026): 396–410. Accessed August 7, 2026. https://spm-online.com/jrep/index.php/journal/article/view/187.