On 2-arc-transitive representations of the groups of fourth-power-free order. - Jiangmin Pan; Zhe Liu 006; Zongwen Yang (Discret. Math., 2010)

The edge-transitive tetravalent Cayley graphs of square-free order. - Cai Heng Li; Zhe Liu 006; Zai Ping Lu (Discret. Math., 2012)