TY - JOUR ID - zu213306 UR - http://eprints.zu.edu.ua/13306/ A1 - ?????, ?. ?. Y1 - 2013/// N2 - We established in sufficient conditions for existence of the integralF[f] ona regular surface and proved an upper Zygmund-type estimate for its modulus ofcontinuity in terms of the modulus of continuity of the function f JF - ?????????? ??????????? "??????????? ??????, ?????? ?????????? ?? ?? ????????????" TI - On the Zygmund-type estimate for a quaternion singular Cauchy integral AV - public ER -