@article{ADM_2008_3_a0,
     author = {T. Banakh and V. Gavrylkiv and O. Nykyforchyn},
     title = {Algebra in superextensions of groups, {I:} zeros and commutativity},
     journal = {Algebra and discrete mathematics},
     pages = {1--29},
     publisher = {mathdoc},
     number = {3},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2008_3_a0/}
}