Nugraharani, Dorotea Galuh Puspita, and Binuko Amarseto. “The Effect of Respiratory Muscle Stretch Gymnastic (RMSG) on Lung Capacity in The Elderly”. Jurnal Biologi Tropis, vol. 24, no. 3, Sept. 2024, pp. 858-62, doi:10.29303/jbt.v24i3.6981.