Personalized Face Emotion Classification Using Optimized Data of Three Features. - M. Karthigayan; R. Nagarajan; Mohamed Rizon; Sazali Yaacob (IIH-MSP, 2007)

Lip pattern in the interpretation of human emotions. - M. Karthigayan; R. Nagarajan; Mohamed Rizon; Sazali Yaacob (Int. J. Artif. Intell. Soft Comput., 2012)