Christian Hagenah, Anca Muscholl. Computing epsilon-free NFA from regular expressions in O(n log:::2:::(n)) time. ITA, 34(4):257-278, 2000.
@article{HagenahM00, title = {Computing epsilon-free NFA from regular expressions in O(n log:::2:::(n)) time}, author = {Christian Hagenah and Anca Muscholl}, year = {2000}, tags = {Epsilon}, researchr = {https://researchr.org/publication/HagenahM00}, cites = {0}, citedby = {0}, journal = {ITA}, volume = {34}, number = {4}, pages = {257-278}, }