@article{IM2_1995_44_1_a1,
     author = {N. A. Zhura},
     title = {General boundary value problem for systems elliptic in the sense of {Douglis--Nirenberg} in~domains with smooth boundary},
     journal = {Izvestiya. Mathematics },
     pages = {21--42},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1995_44_1_a1/}
}