@article{MZM_1980_27_6_a3,
     author = {F. M. Malyshev},
     title = {Decompositions of root systems},
     journal = {Matemati\v{c}eskie zametki},
     pages = {869--876},
     year = {1980},
     volume = {27},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1980_27_6_a3/}
}