Hideki Yamasaki, Masako Takahashi. Generalized Parenthesis Languages and Minimization of their Parenthesis Parts. Theoretical Computer Science, 31:1-11, 1984.
@article{YamasakiT84, title = {Generalized Parenthesis Languages and Minimization of their Parenthesis Parts}, author = {Hideki Yamasaki and Masako Takahashi}, year = {1984}, researchr = {https://researchr.org/publication/YamasakiT84}, cites = {0}, citedby = {0}, journal = {Theoretical Computer Science}, volume = {31}, pages = {1-11}, }