@article{SJVM_2021_24_1_a2,
     author = {I. V. Boikov and V. A. Ryazantsev},
     title = {On the optimal approximation of geophysical fields},
     journal = {Sibirskij \v{z}urnal vy\v{c}islitelʹnoj matematiki},
     pages = {17--34},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJVM_2021_24_1_a2/}
}