@article{unsupervisedefficientandsemanticexpertis,
  title = {Unsupervised, Efficient and Semantic Expertise Retrieval},
  author = {Christophe Van Gysel and Maarten de Rijke and Marcel Worring},
  year = {2016},
  eprint = {1608.06651},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1608.06651v2},
}