Arik, G., Varan, H. D., Yavuz, B. B., Karabulut, E., Kara, O., Kilic, M. K., ... & Halil, M. (2015). Validation of Katz index of independence in activities of daily living in Turkish older adults. Archives of Gerontology and Geriatrics, 61(3), 344-350. DOI: 10.1016/j.archger.2015.08.019