@Article{wu07, author = {Wu, F. and Huberman, B. A.}, title = {Novelty and collective attention}, journal = {Proc. Natl. Acad. Sci. USA}, year = {2007}, number = {45}, url = {http://www.pnas.org/cgi/reprint/104/45/17599.pdf}, doi = {10.1073/pnas.0704916104}, const = {\ text} }