@article{rezk_alemany_2007, 
  title={Designing topic shifts with graphs}, 
  volume={11}, 
  DOI={10.4114/ia.v11i36.888}, 
  number={36}, 
  publisher={IBERAMIA: Sociedad Iberoamericana de Inteligencia Artificial}, 
  author={Rezk and Alemany}, 
  year={2007}, 
  month={Dec}
  }