@article{IIGUM_2019_28_a5,
     author = {N. D. Markhabatov},
     title = {Ranks for families of permutation theories},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {85--94},
     publisher = {mathdoc},
     volume = {28},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2019_28_a5/}
}