@article{IIMI_2018_52_a6,
     author = {A. G. Chentsov},
     title = {Ultrafilters and maximal linked systems: basic properties and topological constructions},
     journal = {Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta},
     pages = {86--102},
     publisher = {mathdoc},
     volume = {52},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIMI_2018_52_a6/}
}