@article{SIGMA_2006_2_a23,
     author = {Grigorii Zhislin},
     title = {On the {Essential} {Spectrum} of {Many-Particle} {Pseudorelativistic} {Hamiltonians} with {Permutational} {Symmetry} {Account}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2006},
     volume = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2006_2_a23/}
}