@article{TRSPY_1975_134_a6,
     author = {E. A. Volkov},
     title = {An a~posteriori error estimate of difference solutions of the {Laplace} and {Poisson} equations},
     journal = {Informatics and Automation},
     pages = {47--62},
     publisher = {mathdoc},
     volume = {134},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1975_134_a6/}
}