1. Evaluating translations of health status questionnaires;Ware;Int J Technol Assess Health Care,1995
2. Ware JE, Gandek B, Keller SD, IQOLA Project Group. Evaluating instruments used cross-nationally: Methods from the IQOLA Project. In: Spilker B, Ed. Quality of Life and Pharmacoeconomics in Clinical Trials. Second Edition. New York: Raven Press; 1996: 681–692.
3. Translating health status questionnaires and evaluating their quality;Bullinger;J Clin Epidemiol,1998
4. Methods for testing data quality, scaling assumptions and reliability;Ware;J Clin Epidemiol,1998
5. Psychometric Theory;Nunnally,1994