@article{MZM_1997_62_1_a9,
     author = {M. V. Zaicev},
     title = {Varieties of affine {Kac{\textendash}Moody} algebras},
     journal = {Matemati\v{c}eskie zametki},
     pages = {95--102},
     year = {1997},
     volume = {62},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1997_62_1_a9/}
}