@article{Shepherdson:1959:RTA:1661907.1661922,
    Address = {Riverton, NJ, USA},
    Author = {Shepherdson, J. C.},
    ISSN = {0018-8646},
    Journal = {IBM J. Res. Dev.},
    Keywords = {automata theory and finite automata},
    Month = {April},
    Number = {2},
    Pages = {198--200},
    Publisher = {IBM Corp.},
    Title = {The reduction of two-way automata to one-way automata},
    URL = {http://dx.doi.org/10.1147/rd.32.0198},
    Volume = {3},
    Year = {1959},
    acmid = {1661922},
    bdsk-url-1 = {http://dx.doi.org/10.1147/rd.32.0198},
    date-added = {2012-12-28 23:19:43 +0000},
    date-modified = {2012-12-28 23:19:51 +0000},
    issue_date = {April 1959},
    numpages = {3},
    doi = {10.1147/rd.32.0198}
}

@article{Shepherdson:1959:RTA:1661907.1661922, Address = {Riverton, NJ, USA}, Author = {Shepherdson, J. C.}, ISSN = {0018-8646}, Journal = {IBM J. Res. Dev.}, Keywords = {automata theory and finite automata}, Month = {April}, Number = {2}, Pages = {198--200}, Publisher = {IBM Corp.}, Title = {The reduction of two-way automata to one-way automata}, URL = {http://dx.doi.org/10.1147/rd.32.0198}, Volume = {3}, Year = {1959}, acmid = {1661922}, bdsk-url-1 = {http://dx.doi.org/10.1147/rd.32.0198}, date-added = {2012-12-28 23:19:43 +0000}, date-modified = {2012-12-28 23:19:51 +0000}, issue_date = {April 1959}, numpages = {3}, doi = {10.1147/rd.32.0198} }