Stephen Bassi Joseph, Emmanuel Gbenga Dada &. “Unsupervised Retinal Blood Vessel Segmentation Technique Using PdAPSO and Difference Image Methods for Detection of Diabetic Retinopathy”. Covenant Journal of Informatics and Communication Technology 6, no. 2 (December 19, 2018). Accessed May 2, 2024. https://journals.covenantuniversity.edu.ng/index.php/cjict/article/view/1179.