@article{IM2_2007_71_3_a4,
     author = {A. L. Delitsyn},
     title = {The statement and solubility of boundary-value problems 
},
     journal = {Izvestiya. Mathematics },
     pages = {495--544},
     publisher = {mathdoc},
     volume = {71},
     number = {3},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2007_71_3_a4/}
}