Abdelrahman, A., Wasseef, M., Hassan, M. and Abdelghafar, E. (2021) “Evaluating the effect of ultrasound–guided superficial serratus plane block, deep serratus plane block and thoracic epidural analgesia in cancer patients undergoing thoracotomy: A randomized controlled trial”, Anaesthesia, Pain & Intensive Care, 25(6), pp. 713-721. doi: 10.35975/apic.v25i6.1690.