HAIDER SZ, SAEED Y, AKRAM M, KHAWAJA S. Comparison of Quincke and Pencil-point bevels in 25-G needles regarding post dural puncture headache in Caesarean Section. Annals KEMU [Internet]. 2021 Jan. 20 [cited 2024 Nov. 22];11(2):81-2. Available from: https://annalskemu.org/journal/index.php/annals/article/view/4238