1. Emergency airway—a plan of action;Nicholas;JAMA,1960
2. Practical aspects of the cricothyroid space;Caparosa;Laryngoscope,1957
3. Emergency airway by cricothyroid puncture or tracheotomy: a comparative study of methods and instruments;Ruhe;Trans Am Acad Ophthalmol Otolaryngol,1960
4. Letter to the editor;Heimlich;Emergency Medicine,1969
5. Management of airway obstruction;Proctor,1965