Kosaburo Hashiguchi, H. Yoo. Extended Regular Expressions of Star Degree at Most Two. Theoretical Computer Science, 76(2-3):273-284, 1990.
@article{HashiguchiY90,
title = {Extended Regular Expressions of Star Degree at Most Two},
author = {Kosaburo Hashiguchi and H. Yoo},
year = {1990},
researchr = {https://researchr.org/publication/HashiguchiY90},
cites = {0},
citedby = {0},
journal = {Theoretical Computer Science},
volume = {76},
number = {2-3},
pages = {273-284},
}