Extraction of high-frequency SSVEP for BCI control using iterative filtering based empirical mode decomposition. - Chuan-Chih Hsu; Chia-Lung Yeh; Wai-Keung Lee; Hao-Teng Hsu; Kuo-Kai Shyu; Lieber Po-Hung Li; Tien-Yu Wu; Po-Lei Lee (Biomed. Signal Process. Control., 2020)