@article{ARM_1980_16_3_a1,
     author = {Dal{\'\i}k, Josef},
     title = {Lattices of generating systems},
     journal = {Archivum mathematicum},
     pages = {137--151},
     year = {1980},
     volume = {16},
     number = {3},
     mrnumber = {594459},
     zbl = {0455.06001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1980_16_3_a1/}
}