%0 Journal Article %T Riesz's and Bessel's Operators in Bilateral Grand Lebesgue Spaces %A E. Ostrovsky %A E. Rogover %A L. Sirota %J Mathematics %D 2009 %I arXiv %X In this paper we obtain the non - asymptotic estimations for Riesz's and Bessel's potential integral operators in the so - called Bilateral Grand Lebesgue Spaces. We also give examples to show the sharpness of these inequalities. %U http://arxiv.org/abs/0907.3321v1