HAN, Nguyen Xuan. Quantization of axial vecto r field.
VNU Journal of Science: Mathematics - Physics
, [S.l.], v. 22, n. 4, dec. 2006. ISSN 2588-1124. Available at: <
https://js.vnu.edu.vn/MaP/article/view/2803
>. Date accessed: 31 may 2025.