@article{UZKU_2011_153_4_a1,
     author = {V. G. Korneev},
     title = {Simple algorithms for calculation of the classical a~posteriori error estimates of numerical solutions of elliptic equations},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {11--27},
     publisher = {mathdoc},
     volume = {153},
     number = {4},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2011_153_4_a1/}
}