@article{Sae12a,
title = "Outer Joins in a Deductive Database System",
journal = "Electronic Notes in Theoretical Computer Science",
volume = "282",
number = "0",
pages = "73 - 88",
year = "2012",
note = "<ce:title>Proceedings of the XI Spanish Conference on Programming and Languages, PROLE 2011</ce:title>",
issn = "1571-0661",
doi = "10.1016/j.entcs.2011.12.007",
url = "http://www.sciencedirect.com/science/article/pii/S1571066111001964",
author = "Fernando S\'aenz-P\'erez",
keywords = "Outer Joins",
keywords = "Deductive Databases",
keywords = "Datalog",
keywords = "SQL"
}