@article{ARM_1977_13_1_a1,
     author = {Dal{\'\i}k, Josef},
     title = {Verbandstheoretische {Eigenschaften} von {Sprachen.} {II}},
     journal = {Archivum mathematicum},
     pages = {13--23},
     year = {1977},
     volume = {13},
     number = {1},
     mrnumber = {0468338},
     zbl = {0374.68044},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/ARM_1977_13_1_a1/}
}