et. al., S. . (2021). Eminent Identification And Segmentation Of Optic Disk In Digital Fundus Images Using Marr- Hildreth Operator. Turkish Journal of Computer and Mathematics Education (TURCOMAT), 12(10), 6123–6128. https://doi.org/10.17762/turcomat.v12i10.5449 (Original work published April 28, 2021)