@inproceedings{CTT100716473,
  author = {K. Horayama and D. Kurabayashi and S. Ahmad and A. Hashimoto and T. Moriyama and T. Choh},
  title = {Guidance of Robot Swarm by Phase Gradient in 3D Space},
  booktitle = {LNAI 9834, Springer},
  year = 2016,
}