@article{ZNSL_1971_23_a9,
     author = {S. G. Michlin},
     title = {On the difference-variational method for the multidimensional boundary value problems},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {99--114},
     publisher = {mathdoc},
     volume = {23},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1971_23_a9/}
}