%0 Journal Article %A I. V. Konnov %T A method of bi-coordinate variations with tolerances and its convergence %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2016 %P 80-85 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2016_1_a7/ %G ru %F IVM_2016_1_a7