@article{100670, author = {Jozef Gruska}, title = {On structural unambiguity of formal languages}, journal = {Czechoslovak Mathematical Journal}, volume = {15}, year = {1965}, pages = {283-294}, zbl = {0133.25503}, mrnumber = {0220549}, language = {en}, url = {http://dml.mathdoc.fr/item/100670} }
Gruska, Jozef. On structural unambiguity of formal languages. Czechoslovak Mathematical Journal, Tome 15 (1965) pp. 283-294. http://gdmltest.u-ga.fr/item/100670/
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