@article{FAA_2002_36_3_a10,
     author = {A. Yu. Konstantinov},
     title = {On the {Essential} {Spectrum} of a {Class} of {Matrix} {Differential} {Operators}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {76--78},
     publisher = {mathdoc},
     volume = {36},
     number = {3},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2002_36_3_a10/}
}