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@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/} }
A. D. Berenshtein; A. V. Zelevinskii. When is the multiplicity of a weight equal to 1?. Funkcionalʹnyj analiz i ego priloženiâ, Tome 24 (1990) no. 4, pp. 1-13. http://geodesic.mathdoc.fr/item/FAA_1990_24_4_a0/