Imana AG, Nugroho YS. UX (USER EXPERIENCE) EVALUATION OF THE OPENLEARNING SYSTEM AT UNIVERSITAS MUHAMMADIYAH SURAKARTA USING HEURISTIC EVALUATION AND USABILITY TESTING. J. Tek. Inform. (JUTIF) [Internet]. 2023Aug.16 [cited 2024Dec.22];4(4):681-9. Available from: http://jutif.if.unsoed.ac.id/index.php/jurnal/article/view/824