@article{Burstall:1977:TSD:321992.321996,
    Address = {New York, NY, USA},
    Author = {Burstall, R. M. and Darlington, John},
    File = {A Transformation System for Developing Recursive Programs - Burstall, Darlington (0) (0) - a - a - f.pdf},
    ISSN = {0004-5411},
    Journal = {J. ACM},
    Keywords = {classic},
    Month = {January},
    Number = {1},
    Pages = {44--67},
    Publisher = {ACM},
    Title = {A Transformation System for Developing Recursive Programs},
    URL = {http://doi.acm.org/10.1145/321992.321996},
    Volume = {24},
    Year = {1977},
    acmid = {321996},
    bdsk-url-1 = {http://doi.acm.org/10.1145/321992.321996},
    bdsk-url-2 = {http://dx.doi.org/10.1145/321992.321996},
    date-added = {2013-09-06 09:05:38 +0000},
    date-modified = {2013-09-06 09:05:51 +0000},
    issue_date = {Jan. 1977},
    numpages = {24},
    doi = {10.1145/321992.321996}
}

@article{Burstall:1977:TSD:321992.321996, Address = {New York, NY, USA}, Author = {Burstall, R. M. and Darlington, John}, File = {A Transformation System for Developing Recursive Programs - Burstall, Darlington (0) (0) - a - a - f.pdf}, ISSN = {0004-5411}, Journal = {J. ACM}, Keywords = {classic}, Month = {January}, Number = {1}, Pages = {44--67}, Publisher = {ACM}, Title = {A Transformation System for Developing Recursive Programs}, URL = {http://doi.acm.org/10.1145/321992.321996}, Volume = {24}, Year = {1977}, acmid = {321996}, bdsk-url-1 = {http://doi.acm.org/10.1145/321992.321996}, bdsk-url-2 = {http://dx.doi.org/10.1145/321992.321996}, date-added = {2013-09-06 09:05:38 +0000}, date-modified = {2013-09-06 09:05:51 +0000}, issue_date = {Jan. 1977}, numpages = {24}, doi = {10.1145/321992.321996} }