@article{MZM_1993_53_4_a10,
     author = {Nguyen Thien Nam},
     title = {Spectrum of nonlinear integral equations and the widths of function classes},
     journal = {Matemati\v{c}eskie zametki},
     pages = {101--110},
     publisher = {mathdoc},
     volume = {53},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1993_53_4_a10/}
}