@article{improvingbilayerproductquantizationfor,
  title = {Improving Bilayer Product Quantization for Billion-Scale Approximate Nearest Neighbors in High Dimensions},
  author = {Artem Babenko and Victor Lempitsky},
  year = {2014},
  eprint = {1404.1831},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1404.1831v1},
}