\input zb-basic \input zb-ioport \iteman{io-port 50133587} \itemau{Kavitha, Ganesan; Ramakrishnan, Swaminathan} \itemti{An approach to identify optic disc in human retinal images using ant colony optimization method} \itemso{J. Medical Systems 34, No. 5, 809-813 (2010).} \itemcc{} \itemut{} \itemli{doi:10.1007/s10916-009-9295-4} \end