@article{SM_1968_6_2_a6,
     author = {B. R. Vainberg},
     title = {On the analytical properties of the resolvent for a certain class of operator-pencils},
     journal = {Sbornik. Mathematics},
     pages = {241--273},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_6_2_a6/}
}