@misc{RefWorks:2692,
  author = 	 {A. Barabasi and R. Albert and H. Jeong},
  year = 	 {1999},
  title = 	 {Scale-free characteristics of random networks: the topology of the world wide web},
  journal = 	 {Physica A},
  volume = 	 {272},
  pages = 	 {173-187}
}
@misc{RefWorks:2691,
  author = 	 {A. L. Barabasi and R. Albert},
  year = 	 {1999},
  title = 	 {Emergence of Scaling in Random Networks},
  journal = 	 {Science},
  volume = 	 {286},
  pages = 	 {509-512}
}
@misc{RefWorks:2693,
  author = 	 {V. Chachra and P. M. Ghare and J. M. Moore},
  year = 	 {1979},
  title = 	 {Applications of Graph Theory Algorithms}
}
@misc{RefWorks:2694,
  author = 	 {W. Christaller},
  year = 	 {1933},
  title = 	 {Central Places in Southern Germany}
}
@misc{RefWorks:2710,
  author = 	 {Yamins D. and S. Rasmussen and D. Fogel},
  year = 	 {2003},
  title = 	 {Growing urban roads},
  journal = 	 {Networks and Spatial Economics},
  volume = 	 {3},
  pages = 	 {69-85}
}
@misc{RefWorks:2695,
  author = 	 {M. Fujita and P. Krugman and A. J. Venables},
  year = 	 {1999},
  title = 	 {The spatial economy: cities, regions, and international trade}
}
@misc{RefWorks:2696,
  author = 	 {W. L. Garrison and D. F. Marble},
  year = 	 {1965},
  title = 	 {A prolegomenon to the forecasting of transportation development}
}
@misc{RefWorks:2697,
  author = 	 {D. Helbing and J. Keltsch and P. Molnár},
  year = 	 {1997},
  title = 	 {Modeling the evolution of human trail systems},
  journal = 	 {Nature},
  volume = 	 {388},
  pages = 	 {47}
}
@misc{RefWorks:2698,
  author = 	 {B. G. Hutchinson},
  year = 	 {1974},
  title = 	 {Principles of Urban Transportation Systems Planning}
}
@misc{RefWorks:2699,
  author = 	 {P. Krugman},
  year = 	 {1996},
  title = 	 {The Self-Organizing Economy}
}
@misc{RefWorks:2701,
  author = 	 {L. Lam},
  year = 	 {1995},
  title = 	 {Active Walker Model Walker Models for Complex systems},
  journal = 	 {Chaos, Solitons and Fractals},
  volume = 	 {6},
  pages = 	 {267-285}
}
@misc{RefWorks:2700,
  author = 	 {L. Lam and R. Pochy},
  year = 	 {1993},
  title = 	 {Active-walker models: growth and form in non-equilibrium systems},
  journal = 	 {Computation simulation},
  volume = 	 {7},
  pages = 	 {534}
}
@misc{RefWorks:2704,
  author = 	 {D. Levinson and R. Karamalaputi},
  year = 	 {2003},
  month = 	 {September 2003},
  title = 	 {Induced Supply: A Model of Highway Network Expansion at the Microscopic Level},
  journal = 	 {Journal of Transport Economics and Policy},
  volume = 	 {37},
  number = 	 {3},
  pages = 	 {297–318}
}
@misc{RefWorks:2703,
  author = 	 {D. Levinson and Ramachandra Karamalaputi},
  year = 	 {2003},
  title = 	 {Predicting the Construction of New Highway Links},
  journal = 	 {Journal of Transportation and Statistics},
  volume = 	 {6},
  number = 	 {2/3},
  pages = 	 {81–89}
}
@misc{RefWorks:2702,
  author = 	 {David Levinson and Bhanu Yerra},
  year = 	 {2006},
  title = 	 {Self Organization of Surface Transportation Networks},
  journal = 	 {Transportation Science},
  volume = 	 {40},
  number = 	 {2},
  pages = 	 {179-188}
}
@misc{RefWorks:2705,
  author = 	 {A. Lösch},
  year = 	 {1954},
  title = 	 {The Economics of Locations}
}
@misc{RefWorks:2706,
  author = 	 {G. F. Newell},
  year = 	 {1980},
  title = 	 {Traffic Flow on Transportation Networks}
}
@misc{RefWorks:2707,
  author = 	 {F. Schweitzer and L. Schimansky-Geier},
  year = 	 {1994},
  title = 	 {Clustering of Active Walkers in a Two-Component System},
  journal = 	 {Physica A},
  volume = 	 {206},
  pages = 	 {359-379}
}
@misc{RefWorks:2708,
  author = 	 {E. J. Taaffe and R. L. Morrill and P. R. Gould},
  year = 	 {1963},
  title = 	 {Transport expansion in underdeveloped countries: a comparative analysis},
  journal = 	 {Geographical Review},
  volume = 	 {53},
  number = 	 {4},
  pages = 	 {503-529}
}
@misc{RefWorks:2709,
  author = 	 {D. J. Watts and S. H. Strogatz},
  year = 	 {1998},
  journal = 	 {Nature},
  volume = 	 {393},
  pages = 	 {440-442},
  note = 	 {6: Collective Dynamics of ‘small-world’ networks}
}