N. L. Rasyidin, H. P. Julianti, D. Ngestiningsih, and Y. Purwoko, “Correlation between Physical Factors, Comorbid Diseases, and Psychic Factors on Quality of Life of the Elderly with Osteoarthritis”, Medica Hospitalia J. Clin. Med., vol. 8, no. 2, pp. 154–159, Jul. 2021.