by 郝佳鑫, 黄永艳
Published in 河南科技大学学报（自然科学版） (2020)

by 解春雷, 杜润梅
Published in 吉林大学学报（理学版） (2021)

by Liu, ZhiHua, Yuan, Rong
Published in Science China. Mathematics (01.08.2017)

by LI, Yan
Published in Acta mathematica scientia (01.05.2016)

by Zhang, ChunJie, Zhang, YuHuai, Ren, FangFang
Published in Science China. Mathematics (01.04.2016)

by Liu, JunFeng, Yan, LiTan
Published in Science China. Mathematics (01.04.2014)

by de OLIVEIRA JUNIOR, Rogerio Luiz Quintino
Published in Acta mathematica scientia (01.09.2013)

by 邓引斌 杨芬
Published in Acta mathematica scientia (01.04.2008)

by Xu, Benlong, Wang, Zhongliang
Published in Chinese annals of mathematics. Serie B (01.11.2008)