@article{FAA_1991_25_3_a7,
     author = {A. N. Kozhevnikov},
     title = {Diagonalization of systems, elliptic in the {Douglis{\textendash}Nirenberg} sense, on manifolds with boundary},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {71--73},
     year = {1991},
     volume = {25},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1991_25_3_a7/}
}