Serial Processing of Emotional Type and Intensity: Evidence from an ERP Study. - Nugraha P. Utama; Atsushi Takemoto; Yasuharu Koike; Katsuki Nakamura (ICONIP (2), 2007)

Single-trial EEG data to classify type and intensity of facial emotion from P100 and N170. - Nugraha P. Utama; Atsushi Takemoto; Katsuki Nakamura; Yasuharu Koike (IJCNN, 2009)

Dimensionality Reduction for Histogram Features Based on Supervised Non-negative Matrix Factorization. - Mitsuru Ambai; Nugraha P. Utama; Yuichi Yoshida (IEICE Trans. Inf. Syst., 2011)