@article{KYB_1972_8_1_a0,
     author = {Hladk\'y, Miroslav},
     title = {Precedence relations and their connection with unambiguity of context-free grammars},
     journal = {Kybernetika},
     pages = {1--11},
     year = {1972},
     volume = {8},
     number = {1},
     mrnumber = {0375849},
     zbl = {0244.68036},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1972_8_1_a0/}
}