This files lists the copyright holders and licenses (if known) of the
various data sets in the igraphdata package:

Koenigsberg
-----------

This data set was collected from Public Domain sources, and it is 
int the Public Domain itself.

Please cite the following publication if you use this data set:

Euler, L.: Solutio problematis ad geometriam situs pertinentis.
Commentarii academiae scientiarum Petropolitanae, 128-140, 1741.


UKfaculty
---------

This dataset is licensed under a Creative Commons
Attribution-Share Alike 2.0 UK: England & Wales License, 
see http://creativecommons.org/licenses/by-sa/2.0/uk/ for details.

Please cite the following reference if you use this dataset:

Nepusz T., Petróczi A., Négyessy L., Bazsó F.: Fuzzy communities and
the concept of bridgeness in complex networks. Physical Review E
77:016107, 2008.

USairports
----------

The data is from the Research and Innovative Technology Administration, 
and it is in the Public Domain.

foodwebs
--------

The data was downloaded from 
http://vlado.fmf.uni-lj.si/pub/networks/data/bio/foodweb/foodweb.htm
Please see the manual page of the data set for the publications 
that you should cite, if you use some of this data.

immuno
------

The data was collected by David Gfeller. Please cite his PhD thesis if 
you use this data set:

D. Gfeller, Simplifying complex networks: from a clustering to a
coarse graining strategy, \emph{PhD Thesis EPFL}, no 3888, 2007.
http://library.epfl.ch/theses/?nr=3888

karate
------

The data was extracted from the original publication.
Please cite:

Wayne W. Zachary. An Information Flow Model for Conflict and
Fission in Small Groups. Journal of Anthropological Research
Vol. 33, No. 4 452-473

macaque
-------

This dataset is licensed under a Creative Commons
Attribution-Share Alike 2.0 UK: England & Wales License, 
see http://creativecommons.org/licenses/by-sa/2.0/uk/ for details.

Please cite the following reference if you use this dataset:

Négyessy L., Nepusz T., Kocsis L., Bazsó F.: Prediction of the main
cortical areas and connections involved in the tactile function of the
visual cortex by network analysis. European Journal of Neuroscience
23(7):1919–1930, 2006. 

yeast
-----

The data was downloaded from 
http://www.nature.com/nature/journal/v417/n6887/suppinfo/nature750.html

Please cite the following paper if you use this data set:

Comparative assessment of large-scale data sets of protein-protein
interactions. Christian von Mering, Roland Krause, Berend Snel,
Michael Cornell, Stephen G. Oliver, Stanley Fields and Peer Bork.
Nature 417, 399-403 (2002)