@article{MZM_2004_75_2_a11,
     author = {I. G. Tsar'kov},
     title = {Nonunique {Solvability} of {Certain} {Differential} {Equations} and {Their} {Connection} with {Geometric} {Approximation} {Theory}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {287--301},
     publisher = {mathdoc},
     volume = {75},
     number = {2},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2004_75_2_a11/}
}