On the Asphericity of Length Four Relative Group Presentations. - Young-Gheel Baik; William A. Bogley; Stephen J. Pride (Int. J. Algebra Comput., 1997)

Arc-transitive circulant digraphs of odd prime-power order. - Ming Yao Xu; Young-Gheel Baik; Hyo-Seob Sim (Discret. Math., 2004)