Stefan Gulan. Series Parallel Digraphs with Loops - Graphs Encoded by Regular Expression. Theory Comput. Syst., 53(2):126-158, 2013. [doi]
@article{Gulan13,
title = {Series Parallel Digraphs with Loops - Graphs Encoded by Regular Expression},
author = {Stefan Gulan},
year = {2013},
doi = {10.1007/s00224-012-9409-0},
url = {http://dx.doi.org/10.1007/s00224-012-9409-0},
researchr = {https://researchr.org/publication/Gulan13},
cites = {0},
citedby = {0},
journal = {Theory Comput. Syst.},
volume = {53},
number = {2},
pages = {126-158},
}