@article{IR,
      author = {Wang, Quan},
      url = {http://digitalcollections.ohsu.edu/record/3935},
      title = {Algebraic unnesting for nested queries},
      abstract = {cse-99-013},
      number = {IR},
      doi = {https://doi.org/10.6083/z890rt49n},
      recid = {3935},
      address = {1999},
}