@article{Gruber_2015,
    doi = {10.1142/s0129054115400110},
    url = {https://doi.org/10.1142%2Fs0129054115400110},
    year = {2015},
    month = {dec},
    publisher = {World Scientific Pub Co Pte Lt},
    volume = {26},
    number = {08},
    pages = {1009--1040},
    author = {Hermann Gruber and Markus Holzer},
    title = {From Finite Automata to Regular Expressions and Back - A Summary on Descriptional Complexity},
    journal = {International Journal of Foundations of Computer Science}
}

@article{Gruber_2015, doi = {10.1142/s0129054115400110}, url = {https://doi.org/10.1142%2Fs0129054115400110}, year = {2015}, month = {dec}, publisher = {World Scientific Pub Co Pte Lt}, volume = {26}, number = {08}, pages = {1009--1040}, author = {Hermann Gruber and Markus Holzer}, title = {From Finite Automata to Regular Expressions and Back - A Summary on Descriptional Complexity}, journal = {International Journal of Foundations of Computer Science} }