@article{TRSPY_1990_192_a1,
     author = {N. S. Bakhvalov and M. \`E. \`Eglit},
     title = {Variational properties of averaged equations for periodic media},
     journal = {Informatics and Automation},
     pages = {5--19},
     publisher = {mathdoc},
     volume = {192},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1990_192_a1/}
}