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We study in the BFKL approach the total hadronic cross section for thecollision of two virtual photons for energies in the range of LEP2 and in therange of future linear colliders. The BFKL resummation is done at thenext-to-leading order in the BFKL Green's function; photon impact factors aretaken instead at the leading order, but with the inclusion of the subleadingterms required by invariance under changes of the renormalization scale and ofthe BFKL scale s_0. We compare our results with previous estimates based on asimilar kind of approximation.

BFKL resummation effects in the gamma* gamma* total hadronic cross section