Islam, M. A., A. Begum, and S. Shahida. “Comparison of 27 G Quincke and 25 G Quincke Needles for Post Dural Puncture Headache in Caesarean Section”. Journal of Armed Forces Medical College, Bangladesh, vol. 12, no. 1, Jan. 2016, pp. 17-21, doi:10.3329/jafmc.v12i1.39951.