academic article

• Rasch analysis in the development of a simplified version of the national eye institute visual-function questionnaire-25 for utility estimation.  Quality of Life Research.  2012
• Rasch analysis in the development of a simplified version of the National Eye Institute Visual-Function Questionnaire-25 for utility estimation..  Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation.  21:323-34. 2011