1. Post dural puncture headache: comparison of 26G Quincke with 25G Whitacre needle for elective caesarian section;Aftab;Pak J Surg,2009
2. To compare the frequency and severity of post-dural puncture headache (PDPH) in parturients given spinal anaesthesia with 25 g quincke with that of 25 g whitacre needle;Malik;Pak J Med Health Sci,2012
3. Post dural puncture headache after spinal anaesthesia for caesarean section: a comparison of 25 g Quincke, 27 g Quincke and 27 g Whitacre spinal needles;Shaikh;J Ayub Med Coll Abbottabad,2008
4. Post dural puncture headache;Chohan;J Pakistan Med Assoc,2003
5. Sub-arachnoid and extradural anaesthesia. Anaesthesia;Grieff,1994