@article{ITA_1984__18_4_307_0,
     author = {Bucher, W. and Culik II, K.},
     title = {On real time and linear time cellular automata},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {307--325},
     publisher = {EDP-Sciences},
     volume = {18},
     number = {4},
     year = {1984},
     mrnumber = {775835},
     zbl = {0547.68050},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1984__18_4_307_0/}
}