@article{doi:10.1137/0210039,
    Author = {Ehrenfeucht, A. and Parikh, R. and Rozenberg, G.},
    EPrint = {http://dx.doi.org/10.1137/0210039},
    File = {Pumping Lemmas for Regular Sets - Ehrenfeucht, Parikh, Rozenberg (0) (0) - a - a - a.pdf},
    Journal = {SIAM Journal on Computing},
    Number = {3},
    Pages = {536-541},
    Title = {Pumping Lemmas for Regular Sets},
    URL = {http://dx.doi.org/10.1137/0210039},
    Volume = {10},
    Year = {1981},
    bdsk-url-1 = {http://dx.doi.org/10.1137/0210039},
    date-added = {2015-05-08 13:10:20 +0000},
    date-modified = {2015-05-08 13:10:20 +0000},
    doi = {10.1137/0210039}
}

@article{doi:10.1137/0210039, Author = {Ehrenfeucht, A. and Parikh, R. and Rozenberg, G.}, EPrint = {http://dx.doi.org/10.1137/0210039}, File = {Pumping Lemmas for Regular Sets - Ehrenfeucht, Parikh, Rozenberg (0) (0) - a - a - a.pdf}, Journal = {SIAM Journal on Computing}, Number = {3}, Pages = {536-541}, Title = {Pumping Lemmas for Regular Sets}, URL = {http://dx.doi.org/10.1137/0210039}, Volume = {10}, Year = {1981}, bdsk-url-1 = {http://dx.doi.org/10.1137/0210039}, date-added = {2015-05-08 13:10:20 +0000}, date-modified = {2015-05-08 13:10:20 +0000}, doi = {10.1137/0210039} }