@article{VMP_2010_11_1_a2,
     author = {A. S. Leonov},
     title = {On a posteriori accuracy estimates for solutions of linear},
     journal = {Numerical methods and programming},
     pages = {14--24},
     year = {2010},
     volume = {11},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMP_2010_11_1_a2/}
}