@article{SF_1994__48_3_135305,
     author = {S.V. Ivanov},
     title = {On subsemigroup lattices of aperiodic groups.},
     journal = {Semigroup forum},
     pages = {131--137},
     year = {1994},
     volume = {48},
     number = {3},
     zbl = {0812.20013},
     url = {http://geodesic.mathdoc.fr/item/SF_1994__48_3_135305/}
}