While looking for an accessible copy of the paywalled Nature paper, "The rewards of restraint in the collective regulation of foraging by harvester ant colonies

While looking for an accessible copy of the paywalled Nature paper, "The rewards of restraint in the collective regulation of foraging by harvester ant colonies," I spotted the following paper which might be useful to some: "Dispersion and Line Formation in Artificial Swarm Intelligence" http://arxiv.org/abs/1407.0014 http://arxiv.org/abs/1407.0014