@article{fund_2004, 
  title={Integrating a Unified Revenue Administration for Tax and Social Contribution Collections: Experiences of Central and Eastern European Countries}, 
  volume={04}, 
  DOI={10.5089/9781451875744.001}, 
  number={237}, 
  publisher={International Monetary Fund (IMF)}, 
  author={Fund}, 
  year={2004}
  }