Nandang Arif Saefuloh. Students’ Problem-Solving Ability in Learning Lines and Series through the Discovery Learning (Dl) Model Reviewed from the Level of Students ’ Self-Efficacy. DE [Internet]. 2024Jan.21 [cited 2024Jul.3];(1):168 -10. Available from: http://thedesignengineering.com/index.php/DE/article/view/9915