@inproceedings{inproceedings7be8afbe,
title   = {Circuit covers in series-parallel mixed graphs},
author = {Lee, Orlando and Wakabayashi, Yoshiko},
year = {1998},
doi = {10.1007/BFb0054324},
publisher = {Springer},
booktitle   = {Latin Symposium on Theoretical Informatics - LATIN}
}