@INPROCEEDINGS{sae14b-prole14,
  author={F. S\'aenz-P\'erez},
  title={{Improving the Deductive System DES with Persistence by Using SQL DBMS's}},
  booktitle={{XIV Jornadas sobre Programaci\'on y Lenguajes, PROLE2014
(SISTEDES)}},
  month={September},
  year={2014}
  }