@article{Haines:1969,
    Author = {Haines, Leonard H.},
    File = {On free monoids partially ordered by embedding - Haines (0) (0) - a - a - t.pdf},
    ISSN = {0021-9800},
    Journal = {Journal of Combinatorial Theory},
    Keywords = {well quasi-orders},
    Number = {1},
    Pages = {94--98},
    Title = {On free monoids partially ordered by embedding},
    URL = {http://www.sciencedirect.com/science/article/pii/S0021980069801110},
    Volume = {6},
    Year = {1969},
    bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/S0021980069801110},
    bdsk-url-2 = {http://dx.doi.org/10.1016/S0021-9800(69)80111-0},
    date-added = {2012-12-29 14:47:13 +0000},
    date-modified = {2016-01-12 13:55:43 +0000},
    doi = {10.1016/S0021-9800(69)80111-0}
}

@article{Haines:1969, Author = {Haines, Leonard H.}, File = {On free monoids partially ordered by embedding - Haines (0) (0) - a - a - t.pdf}, ISSN = {0021-9800}, Journal = {Journal of Combinatorial Theory}, Keywords = {well quasi-orders}, Number = {1}, Pages = {94--98}, Title = {On free monoids partially ordered by embedding}, URL = {http://www.sciencedirect.com/science/article/pii/S0021980069801110}, Volume = {6}, Year = {1969}, bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/S0021980069801110}, bdsk-url-2 = {http://dx.doi.org/10.1016/S0021-9800(69)80111-0}, date-added = {2012-12-29 14:47:13 +0000}, date-modified = {2016-01-12 13:55:43 +0000}, doi = {10.1016/S0021-9800(69)80111-0} }