@article{art528,
  title = {Randomized Comparison Of Tramadol, Nalbuphine And Fentanyl Used As Premedication In Attenuation Of Hemodynamic Response To Laryngoscopy And Postoperative Pain In Laparoscopic Cholecystecyomy},
  url = {https://articlecta.com/index.php/ijecs/article/view/528}
}