@article{ZVMMF_1976_16_6_a22,
     author = {Yu. P. Pyt'ev},
     title = {The correctness of a linear estimation problem},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1584--1586},
     year = {1976},
     volume = {16},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1976_16_6_a22/}
}