@article{Henglein:1993:TIP:169701.169692,
    Address = {New York, NY, USA},
    Author = {Henglein, Fritz},
    File = {Type inference with polymorphic recursion - Henglein (0) (0) - a - a - b.pdf},
    ISSN = {0164-0925},
    Journal = {ACM Trans. Program. Lang. Syst.},
    Keywords = {polymorphism, recursion, semiunification, type inference},
    Month = {April},
    Number = {2},
    Pages = {253--289},
    Publisher = {ACM},
    Title = {Type inference with polymorphic recursion},
    URL = {http://doi.acm.org/10.1145/169701.169692},
    Volume = {15},
    Year = {1993},
    acmid = {169692},
    bdsk-url-1 = {http://doi.acm.org/10.1145/169701.169692},
    bdsk-url-2 = {http://dx.doi.org/10.1145/169701.169692},
    date-added = {2013-07-04 15:07:47 +0000},
    date-modified = {2013-07-04 15:07:47 +0000},
    issue_date = {April 1993},
    numpages = {37},
    doi = {10.1145/169701.169692}
}

@article{Henglein:1993:TIP:169701.169692, Address = {New York, NY, USA}, Author = {Henglein, Fritz}, File = {Type inference with polymorphic recursion - Henglein (0) (0) - a - a - b.pdf}, ISSN = {0164-0925}, Journal = {ACM Trans. Program. Lang. Syst.}, Keywords = {polymorphism, recursion, semiunification, type inference}, Month = {April}, Number = {2}, Pages = {253--289}, Publisher = {ACM}, Title = {Type inference with polymorphic recursion}, URL = {http://doi.acm.org/10.1145/169701.169692}, Volume = {15}, Year = {1993}, acmid = {169692}, bdsk-url-1 = {http://doi.acm.org/10.1145/169701.169692}, bdsk-url-2 = {http://dx.doi.org/10.1145/169701.169692}, date-added = {2013-07-04 15:07:47 +0000}, date-modified = {2013-07-04 15:07:47 +0000}, issue_date = {April 1993}, numpages = {37}, doi = {10.1145/169701.169692} }