N. K. M. Gandari, N. L. P. Apriliani, I. P. W. K. Putra, and I. M. Rismawan, “Effectiveness of Puzzle Therapy as Brain Exercise in Improving Memory Function Among Older Adults with Dementia: A Case Series Study”, Bali Med. Wel. J, vol. 2, no. 3, Jan. 2026.