@article{ZVMMF_2000_40_5_a8,
     author = {V. O. Belash and B. V. Pal'tsev},
     title = {On the spectral and approximating properties of cubic finite-element approximations of the {Laplace} and first-derivative operators: {The} periodic case},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {754--774},
     publisher = {mathdoc},
     volume = {40},
     number = {5},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2000_40_5_a8/}
}