@article{SM_2014_205_5_a2,
     author = {Yu. V. Zhuchok and E. A. Toichkina},
     title = {The endotopism semigroups of an equivalence relation},
     journal = {Sbornik. Mathematics},
     pages = {646--662},
     publisher = {mathdoc},
     volume = {205},
     number = {5},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2014_205_5_a2/}
}