@article{DAN_1983_270_6_a1,
     author = {A. N. Varchenko},
     title = {Semicontinuity of the spectrum and an upper bound for the number of singular points of the projective hypersurface},
     journal = {Doklady Akademii Nauk},
     pages = {1294--1297},
     publisher = {mathdoc},
     volume = {270},
     number = {6},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_270_6_a1/}
}