@article{IIGUM_2016_16_a9,
     author = {S. V. Sudoplatov},
     title = {Closures and generating sets related to combinations of structures},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {131--144},
     year = {2016},
     volume = {16},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2016_16_a9/}
}