1. Coefficient alpha and the internal structure of tests
2. : “Statistical Methods for Rates and Proportions.” John Wiley & Sons, New York, 1981, pp 212–236.
3. , , : Symptoms questionnaire administered to patients prior to and following TURP and to patients prior to and following administration of PROSCAR. Am Urol Assoc Ann Mtg, New Orleans, LA, 1990.