@article{IIGUM_2017_21_a0,
     author = {S. A. Badmaev},
     title = {On some maximal partial ultraclones on a two-element set},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {3--18},
     publisher = {mathdoc},
     volume = {21},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2017_21_a0/}
}