@article{ZVMMF_1981_21_5_a26,
     author = {N. A. Strelkov},
     title = {Projection-difference analogs of the {Laplace} operator},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1326--1328},
     year = {1981},
     volume = {21},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1981_21_5_a26/}
}