Widyawati, S., T. D. Gondhowiardjo, R. L. D. Nora, Y. Harniza, C. P. Samira, and I. B. Alberta. “Clinical and Graft Survival Characteristics of Optical Penetrating Keratoplasty at a Tertiary Care Center in Indonesia: A 4-Years Retrospective Study ”. Journal Of The Indonesian Medical Association, Vol. 72, no. 6, Feb. 2023, pp. 284 -90, doi:10.47830/jinma-vol.72.6-2022-785.