%0 Journal Article %A V. V. Klyuchev %T On necessary conditions for the slow convergence of a class of methods for solving an inverse Cauchy problem in a Banach space %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2005 %P 78-81 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2005_8_a9/ %G ru %F IVM_2005_8_a9