Adriani, D., Y. Imran, M. Mawi, P. Amani, and E. I. Ilyas. “Effect of Brain Gym ® Exercises on Cognitive Function and Brain-Derived Neurotrophic Factor Plasma Level in Elderly: a Randomized Controlled Trial”. Universa Medicina, vol. 39, no. 1, Mar. 2020, pp. 34-41, doi:10.18051/UnivMed.2020.v39.34-41.