Universal hierarchical behavior of citation networks

@article{Mones2014UniversalHB,
  title={Universal hierarchical behavior of citation networks},
  author={Enys Mones and P{\'e}ter Pollner and Tam{\'a}s Vicsek},
  journal={Journal of Statistical Mechanics: Theory and Experiment},
  year={2014},
  volume={2014}
}
Many of the essential features of the evolution of scientific research are imprinted in the structure of citation networks. Connections in these networks imply information about the transfer of knowledge among papers, or, in other words, edges describe the impact of papers on other publications. This inherent meaning of the edges implies that citation networks can exhibit hierarchical features that are typical of networks based on decision making. In this paper, we investigate the hierarchical… 
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