@article{FAA_1983_17_2_a13,
     author = {S. Z. Levendorskii},
     title = {Distribution of eigenvalues of systems of the form $Au=tBu$},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {82--83},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1983_17_2_a13/}
}