by Sizhu, Hu, Guotong, Zheng, Shengshan, Cai, Rukeng, Su
Published in Chinese physics letters (01.02.1993)

by Ran, Yangqiang, Xue, Lihui, Hu, Sizhu, Su, Ru-Keng
Published in Journal of physics. A, Mathematical and general (22.12.2000)

by Zhu, Yun, Hu, Sizhu, Huang, Fengyi, Zhou, Shixun
Published in Physics letters. A (28.03.1988)

by Li, Xinzhou, Cai, Shengshan, Hu, Sizhu, Xu, Jianjun
Published in Physics letters. B (28.01.1988)

by Cai, Shengshan, Hu, Sizhu, Li, Xinzhou, Xu, Jianjun
Published in Chinese physics letters (01.10.1987)

by Rukeng, Su, Yu, Zhong, Sizhu, Hu
Published in Chinese physics letters (01.03.1991)