@inproceedings{macías2005tools,
  title={Tools and strategies for improving PBL laboratory courses with a high student-to-Faculty ratio},
  author={Mac{\'\i}as-Guarasa, J. and San-Segundo, R. and Montero, J.M. and Ferreiros, J. and C{\'o}rdoba, R.},
  booktitle={Frontiers in Education, 2005. FIE'05. Proceedings 35th Annual Conference},
  pages={F2C--7},
  year={2005},
  organization={IEEE}
}