* Traffic percolation.<ref>{{cite journal |author=D. Li, B. Fu, Y. Wang, G. Lu, Y. Berezin, H.E. Stanley, S. Havlin|year=2015|title=Percolation transition in dynamical traffic network with evolving critical bottlenecks|journal=PNAS|volume=112|issue=3|pages=669–72|doi=10.1073/pnas.1419185112|pmid=25552558|pmc=4311803|bibcode=2015PNAS..112..669L}}</ref> | * Traffic percolation.<ref>{{cite journal |author=D. Li, B. Fu, Y. Wang, G. Lu, Y. Berezin, H.E. Stanley, S. Havlin|year=2015|title=Percolation transition in dynamical traffic network with evolving critical bottlenecks|journal=PNAS|volume=112|issue=3|pages=669–72|doi=10.1073/pnas.1419185112|pmid=25552558|pmc=4311803|bibcode=2015PNAS..112..669L}}</ref> |