@article{Sangiorgi:2011:EBH:1889997.1890002,
    Address = {New York, NY, USA},
    Author = {Sangiorgi, Davide and Kobayashi, Naoki and Sumii, Eijiro},
    File = {Environmental bisimulations for higher-order languages - Sangiorgi, Kobayashi, Sumii (0) (0) - a - a - n.pdf},
    ISSN = {0164-0925},
    Journal = {ACM Trans. Program. Lang. Syst.},
    Keywords = {bisimulation equivalence and lambda calculus and readme},
    Month = {January},
    Number = {1},
    Pages = {5:1--5:69},
    Publisher = {ACM},
    Title = {Environmental bisimulations for higher-order languages},
    URL = {http://doi.acm.org/10.1145/1889997.1890002},
    Volume = {33},
    Year = {2011},
    acmid = {1890002},
    articleno = {5},
    bdsk-url-1 = {http://doi.acm.org/10.1145/1889997.1890002},
    bdsk-url-2 = {http://dx.doi.org/10.1145/1889997.1890002},
    date-added = {2013-01-28 12:03:18 +0000},
    date-modified = {2013-01-28 12:04:31 +0000},
    issue_date = {January 2011},
    numpages = {69},
    doi = {10.1145/1889997.1890002}
}

@article{Sangiorgi:2011:EBH:1889997.1890002, Address = {New York, NY, USA}, Author = {Sangiorgi, Davide and Kobayashi, Naoki and Sumii, Eijiro}, File = {Environmental bisimulations for higher-order languages - Sangiorgi, Kobayashi, Sumii (0) (0) - a - a - n.pdf}, ISSN = {0164-0925}, Journal = {ACM Trans. Program. Lang. Syst.}, Keywords = {bisimulation equivalence and lambda calculus and readme}, Month = {January}, Number = {1}, Pages = {5:1--5:69}, Publisher = {ACM}, Title = {Environmental bisimulations for higher-order languages}, URL = {http://doi.acm.org/10.1145/1889997.1890002}, Volume = {33}, Year = {2011}, acmid = {1890002}, articleno = {5}, bdsk-url-1 = {http://doi.acm.org/10.1145/1889997.1890002}, bdsk-url-2 = {http://dx.doi.org/10.1145/1889997.1890002}, date-added = {2013-01-28 12:03:18 +0000}, date-modified = {2013-01-28 12:04:31 +0000}, issue_date = {January 2011}, numpages = {69}, doi = {10.1145/1889997.1890002} }