@article{NSS20,
  author    = {Susana Nieva and
               Fernando S{\'{a}}enz{-}P{\'{e}}rez and
               Jaime S{\'{a}}nchez{-}Hern{\'{a}}ndez},
  title     = {{HR-SQL:} Extending {SQL} with hypothetical reasoning and improved recursion for current database systems},
  journal   = {Information \& Computation},
  volume    = {271},
  year      = {2020},
  url       = {https://doi.org/10.1016/j.ic.2019.104485},
  doi       = {10.1016/j.ic.2019.104485},
  timestamp = {Fri, 27 Mar 2020 08:40:29 +0100},
  biburl    = {https://dblp.org/rec/journals/iandc/NievaSS20.bib},
  bibsource = {dblp computer science bibliography, https://dblp.org}
}