1. A persistent problem with glass ampoules;Stewart;Anaesthesia,1997
2. Persistent problems with propofol ampoules;Ali;Anaesthesia,1997
3. Opening propofol ampoules;Palmer;Anaesthesia,1998
4. The direct flick method for opening ampoules;Smith;Anaesthesia,1998
5. Another cracking idea;Morrison;Anaesthesia,1999