@article{SM_1995_82_1_a8,
     author = {V. A. Kalyagin},
     title = {Hermite{\textendash}Pad\'e approximants and spectral analysis of nonsymmetric operators},
     journal = {Sbornik. Mathematics},
     pages = {199--216},
     year = {1995},
     volume = {82},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_82_1_a8/}
}