Prasetyo, D. T., P. A. R. Raharja, B. J. Mantiri, D. R. L. Ringoringo, I. A. Rahman, J. Felizio, M. P. Tambunan, S. F. Fadhly, and H. E. Rahardjo. “Tadalafil Once a Day for Men With Erectile Dysfunction: Is It Superior Than On-Demand Administration?”. Acta Medica Indonesiana, vol. 51, no. 3, Nov. 2019, p. 275, https://actamedindones.org/index.php/ijim/article/view/746.