Aprilliya, Nonik, and Rahayu Winarti. 2020. “Application of Deep Breath Relaxation Technique to Lower Headache in Hypertension Patients”. Proceedings of the International Conference on Nursing and Health Sciences 1 (1), 117-22. http://jurnal.globalhealthsciencegroup.com/index.php/PICNHS/article/view/331.