@article{10_21136_CMJ_1985_102033,
     author = {Johnston, Katherine},
     title = {Non-modular congruence lattices of {Rees} matrix semigroups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {429--443},
     publisher = {mathdoc},
     volume = {35},
     number = {3},
     year = {1985},
     doi = {10.21136/CMJ.1985.102033},
     mrnumber = {803038},
     zbl = {0592.20062},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1985.102033/}
}