Selected academic articles on OARS:
Fillenbaum, G. G., & Smyer, M. A. (1981). The development, validity, and reliability of the OARS multidimensional functional assessment questionnaire. Journal of gerontology, 36(4), 428–434. https://doi.org/10.1093/geronj/36.4.428
George, L. K., & Fillenbaum, G. G. (1985). OARS methodology. A decade of experience in geriatric assessment. Journal of the American Geriatrics Society, 33(9), 607–615. https://doi.org/10.1111/j.1532-5415.1985.tb06317.x