@article{TIMM_2020_26_1_a20,
     author = {A. G. Chentsov},
     title = {Ultrafilters and maximal linked systems},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {274--292},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2020_26_1_a20/}
}