Development of a personified face emotion recognition technique using fitness function - Karthigayan, Muthukaruppan; Juhari, Mohd Rizon Mohamed; Nagarajan, Ramachandran; Sugisaka, Masanori; Yaacob, Sazali; Mamat, Mohd Rozailan; Desa, Hazry (Artificial Life and Robotics, 2007)