@article{FAA_1983_17_2_a9,
     author = {V. S. Zayachkovskii and A. A. Pankov},
     title = {Stability of factorization of polynomial operator pencils},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {73--74},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1983_17_2_a9/}
}