| J. Gruska |
A note on ε-rules in context-free grammars
Volume 11 no. 1, 26-31, 1975 |
| J. Gruska |
Correction to: “On star height hierarchies of context-free languages”
Volume 9 no. 6, 519, 1973 |
| J. Gruska |
On star height hierarchies of context-free languages
Volume 9 no. 4, 231-236, 1973 |
| J. Gruska |
On the size of context-free grammars
Volume 8 no. 3, 213-218, 1972 |
| J. Gruska |
On a classification of context-free languages
Volume 3 no. 1, 22-29, 1967 |
| J. Gruska |
On sets generated by context-free grammars
Volume 2 no. 6, 483-493, 1966 |