@article{cnnimageretrievallearnsfrombow,
  title = {CNN Image Retrieval Learns from BoW: Unsupervised Fine-Tuning with Hard Examples},
  author = {Filip Radenović and Giorgos Tolias and Ondřej Chum},
  year = {2016},
  eprint = {1604.02426},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1604.02426v3},
}