Ghulam Murtaza Shaikh, Muhammad Muazzam Butt, Mohsin Riaz Askri, Eram Shahzadi, Shumyala Maqbool, Syed Imtiaz Ali Zaidi (2023) “Analgesia after Lower Abdominal Surgery in Children Treated with Caudal Bupivacaine Versus a Bupivacaine-Tramadol Combination”, Pakistan Journal of Medical & Health Sciences, 17(11), p. 137. doi: 10.53350/pjmhs020231711137.