Karim, M., Banik, D., Hye, A., Huda, Q., Laskar, M., Banik, D., & Akhtaruzzaman, A. (2009). Effect of Site of Injection on Spread of Spinal Anaesthesia with Hyperbaric Bupivacaine. Journal of the Bangladesh Society of Anaesthesiologists, 20(2), 51–55. https://doi.org/10.3329/jbsa.v20i2.3991