@article{10_4153_CJM_2014_010_1,
     author = {Chen, Fulin and Gao, Yun and Jing, Naihuan and Tan, Shaobin},
     title = {Twisted {Vertex} {Operators} and {Unitary} {Lie} {Algebras}},
     journal = {Canadian journal of mathematics},
     pages = {573--596},
     year = {2015},
     volume = {67},
     number = {3},
     doi = {10.4153/CJM-2014-010-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2014-010-1/}
}