RAMESH, B.; RAGHUNANDAN, S.; RAMAKRISHNAN, K. Zero Crossing Edge Detection and Contour Tracing for Segmentation of Cervical Cell Nucleus . Defence Science Journal, [S. l.], v. 43, n. 3, p. 223–228, 2013. DOI: 10.14429/dsj.43.4225. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/4225. Acesso em: 5 jul. 2025.