1. Nocturnal penile rigidity measured by Snap-Gauge band;Ek;J Urol,1983
2. New method for continuous measurement of nocturnal penile tumescence and rigidity;Bradley;Urology,1985
3. Clinical value of nocturnal erection in the prognosis and diagnosis of impotence;Karacan;Med Aspects Human Sex,1970
4. The role of the sleep laboratory in diagnosis and treatment of impotence;Karacan,1978
5. Theoretical and technical problems in the measurement of nocturnal penile tumescence for the differential diagnosis of impotence;Wasserman;Psychosom Med,1980