Proton Spin Puzzle: 20 years later
Poincare covariance, Canonical quantization and Gauge invariance in the Nucleon internal structure X.S.Chen, Dept. of Phys., Huazhong Univ. Sci. Tec. X.F.Lu,
X.S.Chen, Dept. of Phys., Huazhong Univ. Sci. Tec. X.F.Lu, Dept. of Phys., Sichuan Univ.
Problems in nucleon structure study X.S.Chen, Dept. of Phys., HUST. W.M.Sun, Dept. of Phys., Nanjing Univ. Fan Wang, Dept. of Phys. Nanjing Univ C.W. Wong,
