N. E. Vikawati, H. P. . Julianti, N. S. . Dewi, and E. S. . Mariani, “Comparison of Modified OTAGO Training Program and Walking Training on Physical Performance in Pre-Frail Elderly”, Medica Hospitalia J. Clin. Med., vol. 10, no. 2, pp. 191–197, Jul. 2023.