@article{GDZPPN000461873,
title = {C1 Changes of Variable: Beurling-Helson Type Theorem and H\"ormander Conjecture on Fourier Multipliers.},
journal = {Geometric and functional analysis},
volume = {4},
year = {1994},
pages = {213-235},
zbl = {0798.42004},
url = {http://dml.mathdoc.fr/item/GDZPPN000461873}
}
Lebedev, V.; Olevskii, A. C1 Changes of Variable: Beurling-Helson Type Theorem and Hörmander Conjecture on Fourier Multipliers.. Geometric and functional analysis, Tome 4 (1994) pp. 213-235. http://gdmltest.u-ga.fr/item/GDZPPN000461873/