@article{engelfriet:1975,
    Author = {Engelfriet, Joost},
    File = {Bottom-up and top-down tree transformations— a comparison - Engelfriet (0) (0) - a - a - a.pdf},
    ISSN = {0025-5661},
    Journal = {Mathematical systems theory},
    Language = {English},
    Number = {2},
    Pages = {198-231},
    Publisher = {Springer-Verlag},
    Title = {Bottom-up and top-down tree transformations--- a comparison},
    URL = {http://dx.doi.org/10.1007/BF01704020},
    Volume = {9},
    Year = {1975},
    bdsk-url-1 = {http://dx.doi.org/10.1007/BF01704020},
    date-added = {2014-01-09 13:43:36 +0000},
    date-modified = {2014-01-09 13:43:36 +0000},
    doi = {10.1007/BF01704020}
}

@article{engelfriet:1975, Author = {Engelfriet, Joost}, File = {Bottom-up and top-down tree transformations— a comparison - Engelfriet (0) (0) - a - a - a.pdf}, ISSN = {0025-5661}, Journal = {Mathematical systems theory}, Language = {English}, Number = {2}, Pages = {198-231}, Publisher = {Springer-Verlag}, Title = {Bottom-up and top-down tree transformations--- a comparison}, URL = {http://dx.doi.org/10.1007/BF01704020}, Volume = {9}, Year = {1975}, bdsk-url-1 = {http://dx.doi.org/10.1007/BF01704020}, date-added = {2014-01-09 13:43:36 +0000}, date-modified = {2014-01-09 13:43:36 +0000}, doi = {10.1007/BF01704020} }