1. Are pencil point needles safe for subarachnoid block?;Collier;Anaesthesia,1998
2. Pencil-point needles and combined spinal epidural block. Why needle through needle?;Morris;Anaesthesia,1998
3. Combined epidural spinal anaesthesia for Caesarean section. Through the needle or in separate spaces?;Lyons;Anaesthesia,1992
4. Combined spinal epidural (CSE) analgesia: technique, management, and outcome of 300 mothers;Collis;International Journal of Obstetric Anesthesia,1994
5. Evaluation of combined spinal-epidural anaesthesia using two different techniques;Joshi;Regional Anesthesia,1994