Virmani, Jitendra, Vinod Kumar, Naveen Kalra, and Niranjan Khandelwa. “PCA-SVM Based CAD System for Focal Liver Lesions Using B-Mode Ultrasound Images”. Defence Science Journal 63, no. 5 (September 25, 2013): 478–486. Accessed August 18, 2025. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/3951.