%0 Journal Article %A M. Yu. Kokurin %T Conditions of sourcewise representability and power estimates of convergence rate in Tikhonov's scheme for solving ill-posed extremal problems %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2014 %P 72-82 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2014_7_a6/ %G ru %F IVM_2014_7_a6