@article{CMUC_1979_20_2_a5,
     author = {Trnkov\'a, V\v{e}ra},
     title = {Behaviour of machines in categories},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {267--282},
     year = {1979},
     volume = {20},
     number = {2},
     mrnumber = {539556},
     zbl = {0412.18007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1979_20_2_a5/}
}