@article{DAN_1987_295_3_a5,
     author = {Yu. P. Pyt'ev},
     title = {On the accuracy and reliability of the interpretation of indirect},
     journal = {Doklady Akademii Nauk},
     pages = {542--545},
     publisher = {mathdoc},
     volume = {295},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_295_3_a5/}
}