Roozbahani, Tahereh, Manijeh Nourian, Kiyarash Saatchi, and Azam Moslemi. 2017. “Effect of Progressive Muscle Relaxation on Anxiety in Pre-University Students: A Randomized Controlled Clinical Trial”. Advances in Nursing & Midwifery 27 (2), 32-37. https://journals.sbmu.ac.ir/en-jnm/article/view/17872.