Neural Network Based Emotion Estimation Using Heart Rate Variability and Skin Resistance. - Sun Kook Yoo; Chung Ki Lee; Youn Jung Park; Nam H. Kim; Byung Chae Lee; Kee Sam Jeong (ICNC (1), 2005)

Portable Device for Bi-emotional State Identification Using Heart Rate Variability. - Sun Kook Yoo; Chung Ki Lee; Gun Ki Lee; Byung Chae Lee; Kee Sam Jeong; Yoon Jung Park (UCS, 2006)