BibTeX

@article{liomao08,
  author = {Christina Lioma and Iadh Ounis},
  title = {A syntactically-based query reformulation technique for information
	retrieval},
  journal = {Inf. Process. Manage.},
  year = {2008},
  volume = {44},
  pages = {143-162},
  number = {1},
  ee = {https://dx.doi.org/10.1016/j.ipm.2006.12.005}
}