@techreport{Andrzejewski:2013,
  author    = "W. Andrzejewski and A. Gramacki and J. Gramacki",
  title     = "Density estimations for approximate query processing on SIMD architectures, RA-03/2013",
  institution = "Politechnika Poznańska, Instytut Informatyki",
  year      = "2013",
  note = " http://arxiv.org/pdf/1505.01998v1.pdf ",
}