Cahyaningrum H, Sari A, Umatin K. The Effect of Breathing Exercise and Progressive Muscle Relaxation on Improving Sleep Quality in Postmenopausal Women. jitek [Internet]. 30Sep.2025 [cited 2Sep.2026];13(1):29-8. Available from: https://ejurnal.poltekkesjakarta3.ac.id/index.php/jitek/article/view/2261