@article{benevenuto2015connected,
  
title={{How Connected are the ACM SIG Communities?}},
  
author={Benevenuto, Fabr{\'\i}cio and Laender, Alberto HF and Alves, Bruno L},
  
journal={SIGMOD Record},
  
volume={44},
  
number={4},
  
pages={57},
  
year={2015}

}