@article{MZM_1981_29_1_a4,
     author = {M. V. Mosolova},
     title = {Functions of noncommuting operators that generate a graded {Lie} algebra},
     journal = {Matemati\v{c}eskie zametki},
     pages = {35--44},
     year = {1981},
     volume = {29},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1981_29_1_a4/}
}