Adhikari, C. M., S. Dhungel, A. Bogati, J. Adhikari, M. Shrestha, and K. P. Acharya. “ASD Device Closure in Elderly Adults”. Asian Journal of Medical Sciences, vol. 10, no. 3, May 2019, pp. 17-20, doi:10.3126/ajms.v10i3.23195.