@article{ZNSL_2017_463_a4,
     author = {Y. L. Gurieva and V. P. Il'in},
     title = {On coarse grid correction methods in {Krylov} subspaces},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {44--57},
     publisher = {mathdoc},
     volume = {463},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2017_463_a4/}
}