Erkki Mäkinen. A Note on Pure Grammars. Inf. Process. Lett., 23(5):271-274, 1986.
@article{Makinen86:0, title = {A Note on Pure Grammars}, author = {Erkki Mäkinen}, year = {1986}, tags = {grammar}, researchr = {https://researchr.org/publication/Makinen86%3A0}, cites = {0}, citedby = {0}, journal = {Inf. Process. Lett.}, volume = {23}, number = {5}, pages = {271-274}, }