Improving SSVEP-BCI System Interaction Efficiency: Design Recommendations for Shape of Visual Stimuli and Number of Auxiliary Stimuli. - Yafeng Niu; Zhaozhe Zhou; Zhiyuan Li; Jiahao Wang; Jinchun Wu; Wenjun Yang; Chengqi Xue (Int. J. Hum. Comput. Interact., 2024)