W. W. Widiyanto, M. . Nizam Husen, S. Pariyasto, and E. Susanto, “Comparative Analysis of RGB and Grayscale Pixel-Based Similarity Methods for Lung X-ray Image Retrieval in Clinical Decision Support Systems”, J. Tek. Inform. (JUTIF), vol. 6, no. 6, pp. 5854–5864, Dec. 2025.