Geodesic
On conditions for approximation of a lexicographical problem
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 20 (1980) no. 4, pp. 889-900 
E. R. Avakov. On conditions for approximation of a lexicographical problem. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 20 (1980) no. 4, pp. 889-900. http://geodesic.mathdoc.fr/item/ZVMMF_1980_20_4_a7/
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     author = {E. R. Avakov},
     title = {On conditions for approximation of a lexicographical problem},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {889--900},
     year = {1980},
     volume = {20},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1980_20_4_a7/}
}
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