@article{Karr:ActaInf:1976,
    Address = {Secaucus, NJ, USA},
    Author = {Karr, Michael},
    File = {karr (0) - a - a - s.pdf},
    ISSN = {0001-5903},
    Journal = {Acta Inf.},
    Keywords = {classic},
    Month = {June},
    Number = {2},
    Pages = {133--151},
    Publisher = {Springer-Verlag New York, Inc.},
    Title = {Affine Relationships Among Variables of a Program},
    URL = {http://dx.doi.org/10.1007/BF00268497},
    Volume = {6},
    Year = {1976},
    acmid = {2696986},
    bdsk-url-1 = {http://dx.doi.org/10.1007/BF00268497},
    date-added = {2018-07-19 16:00:08 +0000},
    date-modified = {2018-07-19 16:00:25 +0000},
    issue_date = {June 1976},
    numpages = {19},
    doi = {10.1007/BF00268497}
}

@article{Karr:ActaInf:1976, Address = {Secaucus, NJ, USA}, Author = {Karr, Michael}, File = {karr (0) - a - a - s.pdf}, ISSN = {0001-5903}, Journal = {Acta Inf.}, Keywords = {classic}, Month = {June}, Number = {2}, Pages = {133--151}, Publisher = {Springer-Verlag New York, Inc.}, Title = {Affine Relationships Among Variables of a Program}, URL = {http://dx.doi.org/10.1007/BF00268497}, Volume = {6}, Year = {1976}, acmid = {2696986}, bdsk-url-1 = {http://dx.doi.org/10.1007/BF00268497}, date-added = {2018-07-19 16:00:08 +0000}, date-modified = {2018-07-19 16:00:25 +0000}, issue_date = {June 1976}, numpages = {19}, doi = {10.1007/BF00268497} }