@article{ITA_1978__12_2_83_0,
     author = {Walter, Hermann K.-G. and Keklikoglou, Joannis and Kern, Werner},
     title = {The behaviour of parsing time under grammar morphisms},
     journal = {RAIRO. Informatique th\'eorique},
     pages = {83--97},
     publisher = {EDP-Sciences},
     volume = {12},
     number = {2},
     year = {1978},
     mrnumber = {489063},
     zbl = {0384.68074},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1978__12_2_83_0/}
}