@article{Dong_1998,
    doi = {10.1006/jcss.1998.1565},
    url = {https://doi.org/10.1006%2Fjcss.1998.1565},
    year = {1998},
    month = {dec},
    publisher = {Elsevier {BV}},
    volume = {57},
    number = {3},
    pages = {289--308},
    author = {Guozhu Dong and Jianwen Su},
    title = {Arity Bounds in First-Order Incremental Evaluation and Definition of Polynomial Time Database Queries},
    journal = {Journal of Computer and System Sciences}
}

@article{Dong_1998, doi = {10.1006/jcss.1998.1565}, url = {https://doi.org/10.1006%2Fjcss.1998.1565}, year = {1998}, month = {dec}, publisher = {Elsevier {BV}}, volume = {57}, number = {3}, pages = {289--308}, author = {Guozhu Dong and Jianwen Su}, title = {Arity Bounds in First-Order Incremental Evaluation and Definition of Polynomial Time Database Queries}, journal = {Journal of Computer and System Sciences} }