EN
For the convolution operators $A_{a}^{α}$ with symbols $a(|ξ|)|ξ|^{-α} exp{i|ξ|}$, 0 ≤ Re α < n, $a(|ξ|) ∈ L_{∞}$, we construct integral representations and give the exact description of the set of pairs (1/p,1/q) for which the operators are bounded from $L_{p}$ to $L_{q}$.