@article{SF_1986__33_134814,
     author = {K.G. Johnston},
     title = {Semimodularity and weak modularity in subalgebra lattices of completely simple semigroups.},
     journal = {Semigroup forum},
     pages = {285--292},
     publisher = {mathdoc},
     volume = {33},
     year = {1986},
     zbl = {0584.20049},
     url = {http://geodesic.mathdoc.fr/item/SF_1986__33_134814/}
}