How to find the way out of a forest? By a collective disciplined march, or rather by many individual scouts searching in different directions?: Comments by S. Solomon on the Visioneer white papers by D. Helbing and S. Balietti
Eur. Phys. J. Special Topics, 195 (2011) 159-160
DOI: https://doi.org/10.1140/epjst/e2011-01408-1