@article{VMP_2011_12_1_a17,
     author = {M. Yu. Kokurin},
     title = {On an algorithmic feasibility of source conditions in iterative
},
     journal = {Numerical methods and programming},
     pages = {146--151},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMP_2011_12_1_a17/}
}