(原始内容存档于2014-04-07). Complex systems are poorly understood Kellert, S.H. In the Wake of Chaos: Unpredictable Order in DynamicalSystems. University of Chicago
[2011-09-03]. (原始内容存档于2011-08-23). 维基共享资源上的相关多媒体资源:暗物质 The Dark Matter Crisis The European astroparticle physics network A nice animation about dark matter