@article{MMO_1973_28_a3,
     author = {G. I. \`Eskin},
     title = {Boundary value problems and the parametrix for elliptic systems of pseudodifferential equations},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {75--116},
     publisher = {mathdoc},
     volume = {28},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1973_28_a3/}
}