@article{Gries:1977:EPP:359897.359903,
    Address = {New York, NY, USA},
    Author = {Gries, David},
    File = {An exercise in proving parallel programs correct - Gries (0) (0) - a - a - l.pdf},
    ISSN = {0001-0782},
    Journal = {Commun. ACM},
    Month = {December},
    Number = {12},
    Pages = {921--930},
    Publisher = {ACM},
    Title = {An exercise in proving parallel programs correct},
    URL = {http://doi.acm.org/10.1145/359897.359903},
    Volume = {20},
    Year = {1977},
    acmid = {359903},
    bdsk-url-1 = {http://doi.acm.org/10.1145/359897.359903},
    bdsk-url-2 = {http://dx.doi.org/10.1145/359897.359903},
    date-added = {2013-11-08 08:03:37 +0000},
    date-modified = {2013-11-08 08:03:51 +0000},
    issue_date = {Dec. 1977},
    numpages = {10},
    doi = {10.1145/359897.359903}
}

@article{Gries:1977:EPP:359897.359903, Address = {New York, NY, USA}, Author = {Gries, David}, File = {An exercise in proving parallel programs correct - Gries (0) (0) - a - a - l.pdf}, ISSN = {0001-0782}, Journal = {Commun. ACM}, Month = {December}, Number = {12}, Pages = {921--930}, Publisher = {ACM}, Title = {An exercise in proving parallel programs correct}, URL = {http://doi.acm.org/10.1145/359897.359903}, Volume = {20}, Year = {1977}, acmid = {359903}, bdsk-url-1 = {http://doi.acm.org/10.1145/359897.359903}, bdsk-url-2 = {http://dx.doi.org/10.1145/359897.359903}, date-added = {2013-11-08 08:03:37 +0000}, date-modified = {2013-11-08 08:03:51 +0000}, issue_date = {Dec. 1977}, numpages = {10}, doi = {10.1145/359897.359903} }