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Andrian Suner, Linda Trisna. Effectiveness of Eight Weeks Pencil Push Up Therapy for Patients with Convergence Insufficieny in Mohammad Hoesin Hospital Palembang. sjo [Internet]. 2018Jun.18 [cited 2024Apr.19];1(1):18-6. Available from: https://sriwijayaopthalmology.com/index.php/sjo/article/view/42