@article{FAA_1990_24_4_a0,
     author = {A. D. Berenshtein and A. V. Zelevinskii},
     title = {When is the multiplicity of a weight equal to 1?},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {1--13},
     publisher = {mathdoc},
     volume = {24},
     number = {4},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1990_24_4_a0/}
}