@article{ADM_2007_1_a1,
     author = {Ivan Chuchman and Oleg Gutik},
     title = {On $H$-closed topological semigroups and semilattices},
     journal = {Algebra and discrete mathematics},
     pages = {13--23},
     publisher = {mathdoc},
     number = {1},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2007_1_a1/}
}