@article{IM2_1969_3_3_a5,
     author = {G. M. Zhislin},
     title = {Spectrum of differential operators of quantum-mechanical many-particle systems in spaces of functions of a~given symmetry},
     journal = {Izvestiya. Mathematics },
     pages = {559--616},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {1969},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1969_3_3_a5/}
}