@article{DAN_1975_221_3_a1,
     author = {N. S. Bakhvalov},
     title = {Averaging of partial differential equations with rapidly oscillating coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {516--519},
     publisher = {mathdoc},
     volume = {221},
     number = {3},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_221_3_a1/}
}