Mohammad, T. et al. 2021. A Comparison of Using Crystalloid Preloading and Co-Loading in Caesarean Section Operation Under Spinal Anaesthesia and Its Association with Spinal Anaesthesia Induced Hypotension and Heart Rate Variability. Journal of Dhaka Medical College. 29, 1 (Jan. 2021), 12–17. DOI:https://doi.org/10.3329/jdmc.v29i1.51164.