1. Pain Sensations and Reactions;Hardy,1952
2. A method for quantifying the intensity of pain;Beecher;Science,1953
3. Measurement of Subjective Responses;Beecher,1959
4. A method of testing analgesics in man;Hewer;Lancet,1948
5. A clinical method of assessing analgesics;Hewer;Lancet,1949