The pagenumber of toroidal graphs is at most seven

@article{Endo1997ThePO,
  title={The pagenumber of toroidal graphs is at most seven},
  author={Toshiki Endo},
  journal={Discrete Mathematics},
  year={1997},
  volume={175},
  pages={87-96}
}
In this paper, we show that seven pages are sufficient for a book embedding of any toroidal graph.