@misc{florian_thiery_2017_921997, author = {Florian Thiery and Axel Kunz and Matthias Dufner}, title = {labeling system}, month = sep, year = 2017, publisher = {Zenodo}, doi = {10.5281/zenodo.921997}, url = {https://doi.org/10.5281/zenodo.921997} }