@article{lmcs:905,
    title      = {Composition with Target Constraints},
    author     = {Marcelo Arenas and Ronald Fagin and Alan Nash},
    url        = {https://lmcs.episciences.org/905},
    doi        = {10.2168/LMCS-7(3:13)2011},
    journal    = {Logical Methods in Computer Science},
    issn       = {1860-5974},
    volume     = {Volume 7, Issue 3},
    eid        = 13,
    year       = {2011},
    month      = {Sep},
    keywords   = {Computer Science - Databases, H.2.5},
}