Minyou Chen, Xuemin Tan, John Q. Gan, Li Zhang & Wenjuan Jian. (2019). A Batch-mode Active Learning Method Based on the Nearest Average-class Distance (NACD) for Multiclass Brain-Computer Interfaces.
            <i>Journal of Fiber Bioengineering and Informatics</i>. <i>7</i> (4).
            627-636.
         doi:10.3993/jfbi12201415