@article{DMGAA_2007_27_1_a6,
     author = {Belovs, Aleksandrs and Buls, J\={a}nis},
     title = {The completely distributive lattice of machine invariant sets of infinite words},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {109--121},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2007_27_1_a6/}
}