@article{oai:tsukuba.repo.nii.ac.jp:00015890,
 author = {Morita, Jun},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {1--8},
 title = {Coverings of generalized Chevalley groups associated with affine Lie algebras},
 volume = {6},
 year = {1982}
}