@article{MZM_1983_33_4_a2,
     author = {O. G. Kharlampovich},
     title = {Universal theory of the class of finite nilpotent groups is unsolvable},
     journal = {Matemati\v{c}eskie zametki},
     pages = {499--516},
     publisher = {mathdoc},
     volume = {33},
     number = {4},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1983_33_4_a2/}
}