Internal/external frame of reference: exploring the paradoxical relations between mathematics and self-concept across 29 countries: Internal/external frame of reference: exploring the paradoxical relations between mathematics and self-concept across 29 countries. GJE [Internet]. 2017 Dec. 1 [cited 2026 Aug. 21];4:44-59. Available from: https://journal.ucc.edu.gh/index.php/gje/article/view/495