@article{SM_1987_56_2_a14,
     author = {A. A. Zlotnik and I. D. Turetaev},
     title = {Sharp error estimates of some two-level methods of solving the three-dimensional heat equation},
     journal = {Sbornik. Mathematics},
     pages = {529--544},
     publisher = {mathdoc},
     volume = {56},
     number = {2},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1987_56_2_a14/}
}