@article{DE_1973_9_4_a22,
     author = {A. D. Myshkis and N. P. Parshikova},
     title = {Estimation of the value of a known functional from an unknown solution},
     journal = {Differencialʹnye uravneni\^a},
     pages = {754--756},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_4_a22/}
}