Balwinder Kaur Rekhi, Priyanka Mehta, & Sandeep Kaur Sidhu. (2019). Comparative study of butorphanol and fentanyl in attenuation of haemodynamic responses in laparoscopic cholecystectomy. GMC Patiala Journal of Research and Medical Education, 2(1), 33–38. https://doi.org/10.56412/gmcp.2019.2.1.37