PHYSICS LETTERS A

ZU FX, ZHANG FC, WANG D, NI Y, WANG SL, DING CL, GAO GY

PHYSICS LETTERS A

ZHAO WK, JI GM, LIU DS

PHYSICS LETTERS A

LU XL, JIANG LW, ZHENG YS

PHYSICS LETTERS A

WANG LY

PHYSICS LETTERS A

ZHAO P, LIU DS, LI SJ, CHEN G

PHYSICS LETTERS A

XU N, WANG BL, SHI DN, WANG YZ, ZHANG C

PHYSICS LETTERS A

DAI CJ, YAN XH, GUO YD, XIAO Y

PHYSICS LETTERS A

DENG XQ, TANG GP, GUO C

PHYSICS LETTERS A

ZHOU BH, ZHOU BL, ZENG AH, ZHOU GH

PHYSICS LETTERS A

YANG M, CUI Y, WANG RQ, ZHAO HB