@Book{CDFSTB01,
  author = 	 {S. Camazine and J.-L. Deneubourg and N. R. Franks and J. Sneyd and 
                  G. Theraulaz and E. Bonabeau},
  title = 	 {Self-Organization in Biological Systems},
  publisher = 	 {Princeton University Press},
  year = 	 {2001}
}