T. Chaitongdee, W. Srisodaphol, O. Rahmashari, B. Rattanawong, and K. Prakhammin, “Enhanced Outlier Detection in Linear-Circular Regression Using Circular Distance and Mean Resultant Length”, Stat., optim. inf. comput., vol. 14, no. 1, pp. 454-468, Jun. 2025.