@article{GFA_1994__4_6_58161,
     author = {V. Lebedev and A. Olevskii},
     title = {C1 {Changes} of {Variable:} {Beurling-Helson} {Type} {Theorem} and {H\"ormander} {Conjecture} on {Fourier} {Multipliers.}},
     journal = {Geometric and functional analysis},
     pages = {213--235},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1994},
     zbl = {0798.42004},
     url = {http://geodesic.mathdoc.fr/item/GFA_1994__4_6_58161/}
}