@article{TMF_2000_124_2_a4,
     author = {A. V. Shchepetilov},
     title = {Two-body problem on spaces of constant curvature: {I.~Dependence} of the {Hamiltonian} on the symmetry group and the reduction of the classical system},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {249--264},
     publisher = {mathdoc},
     volume = {124},
     number = {2},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2000_124_2_a4/}
}