@inproceedings{biro2015bounds,
  title={Bounds on the number of hint squares for Shakashaka},
  author={Biro, Michael and Hamamoto, Tomohiso and Schmidt, Christiane, and Uno, Yushi},
  booktitle={Proceedings of the 18th Japan Conference on Discrete and Computational Goemetry and Graphs (JCDCG$^2$ 2015)},
  year={2015},
  url={https://drive.google.com/file/d/0B_e4DG2_6-rGUElfXzB3Y1VIWjg/view?usp=sharing}
}