Guoli Ding, Alexander Schrijver, Paul D. Seymour. Disjoint Cycles in Directed Graphs on the Torus and the Klein Bottle. Journal of Combinatorial Theory, Series A, 58(1):40-45, 1993. [doi]
@article{DingSS93,
title = {Disjoint Cycles in Directed Graphs on the Torus and the Klein Bottle},
author = {Guoli Ding and Alexander Schrijver and Paul D. Seymour},
year = {1993},
doi = {10.1006/jctb.1993.1029},
url = {http://dx.doi.org/10.1006/jctb.1993.1029},
tags = {graph-rewriting, rewriting},
researchr = {https://researchr.org/publication/DingSS93},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {58},
number = {1},
pages = {40-45},
}