@article{MoellerRoocks2015,
  author    = {Bernhard M{\"o}ller and Patrick Roocks},
  title     = {An algebra of database preferences},
  journal   = {Journal of Logical and Algebraic Methods in Programming},
  volume    = {84},
  number    = {3},
  pages     = {456 -- 481},
  doi       = {10.1016/j.jlamp.2015.01.001},
  year      = {2015},
}