@article{Place:2015:TQA:2815493.2815495,
    Address = {New York, NY, USA},
    Author = {Place, Thomas and Zeitoun, Marc},
    File = {p4-place (0) - a - a - h.pdf},
    ISSN = {2372-3491},
    Journal = {ACM SIGLOG News},
    Month = {August},
    Number = {3},
    Pages = {4--17},
    Publisher = {ACM},
    Title = {The Tale of the Quantifier Alternation Hierarchy of First-order Logic over Words},
    URL = {http://doi.acm.org/10.1145/2815493.2815495},
    Volume = {2},
    Year = {2015},
    acmid = {2815495},
    bdsk-url-1 = {http://doi.acm.org/10.1145/2815493.2815495},
    bdsk-url-2 = {http://dx.doi.org/10.1145/2815493.2815495},
    date-added = {2017-04-04 05:59:25 +0000},
    date-modified = {2017-04-04 05:59:25 +0000},
    issue_date = {July 2015},
    numpages = {14},
    doi = {10.1145/2815493.2815495}
}

@article{Place:2015:TQA:2815493.2815495, Address = {New York, NY, USA}, Author = {Place, Thomas and Zeitoun, Marc}, File = {p4-place (0) - a - a - h.pdf}, ISSN = {2372-3491}, Journal = {ACM SIGLOG News}, Month = {August}, Number = {3}, Pages = {4--17}, Publisher = {ACM}, Title = {The Tale of the Quantifier Alternation Hierarchy of First-order Logic over Words}, URL = {http://doi.acm.org/10.1145/2815493.2815495}, Volume = {2}, Year = {2015}, acmid = {2815495}, bdsk-url-1 = {http://doi.acm.org/10.1145/2815493.2815495}, bdsk-url-2 = {http://dx.doi.org/10.1145/2815493.2815495}, date-added = {2017-04-04 05:59:25 +0000}, date-modified = {2017-04-04 05:59:25 +0000}, issue_date = {July 2015}, numpages = {14}, doi = {10.1145/2815493.2815495} }