@article{TIMM_2013_19_1_a25,
     author = {V. P. Tanana and A. B. Bredikhina},
     title = {On the optimality of a~generalization of {M.\,M.~Lavrent'ev's} method in the solution of equations with an error in the operator},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {258--263},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2013_19_1_a25/}
}