@article{DE_1982_18_11_a5,
     author = {I. M. Vul'pe},
     title = {Averaging of partial differential equations with respect to independent variables},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1887--1893},
     publisher = {mathdoc},
     volume = {18},
     number = {11},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1982_18_11_a5/}
}