@article{AL_2017_56_2_a1,
     author = {Yu. L. Ershov},
     title = {The $d$-rank of a~topological space},
     journal = {Algebra i logika},
     pages = {150--163},
     publisher = {mathdoc},
     volume = {56},
     number = {2},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2017_56_2_a1/}
}