Abo-Sabaa, M. A., El kumity, A. A., Amr, Y. A. A. (2019). 'Comparative Study between Ultrasound Guided Pectoral Nerves Block and Thoracic Paravertebral Block as Postoperative Analgesia in Breast Surgeries', The Egyptian Journal of Hospital Medicine, 76(4), pp. 3997-4006. doi: 10.21608/ejhm.2019.42125