@article{AA_1993_5_4_a1,
     author = {R. F. Bikbaev},
     title = {Algebro-geometric inequalities generated by perturbation theory: the nonlinear {Schr\"odinger} equation},
     journal = {Algebra i analiz},
     pages = {67--82},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1993_5_4_a1/}
}