Yan Zhao, Fengchun Lei & Fengling Li
10.13447/j.1674-5647.2017.03.03Commun. Math. Res., 33 (2017), pp. 215-222.
Huihui Zhang, Xiao Yu & Zhongqi Xiang
10.13447/j.1674-5647.2017.03.06Commun. Math. Res., 33 (2017), pp. 259-273.
Chunru Wang, Xueming Ren & Siyao Ma
10.13447/j.1674-5647.2017.03.07Commun. Math. Res., 33 (2017), pp. 274-280.