1. The Bullard laryngoscope: a new indirect oral laryngoscope;Borland;Anesth Analg,1990
2. Clinical assessment of the adult Bullard laryngoscope;Saunders;Can I Anaesth,1989
3. Ultrasonic nebuliser in local anesthesia for bronchoscopy;Palva;J Otolaryngol,1975
4. Fiberoptic intubation;Watson,1990
5. A clinical sign to predict difficult tracheal intubation;Mallampati;Can Anaesth Soc J,1985