@article{Tsitsiklis:2007:NCU:2283936.2283982,
    Address = {Amsterdam, The Netherlands, The Netherlands},
    Author = {Tsitsiklis, John N.},
    File = {NP-Hardness of Checking the Unichain Condition in Average Cost MDPs - Tsitsiklis (0) (0) - a - a - a.pdf},
    ISSN = {0167-6377},
    Journal = {Oper. Res. Lett.},
    Keywords = {Average cost, Markov decision processes, Unichain condition},
    Month = {May},
    Number = {3},
    Pages = {319--323},
    Publisher = {Elsevier Science Publishers B. V.},
    Title = {NP-Hardness of Checking the Unichain Condition in Average Cost MDPs},
    URL = {http://dx.doi.org/10.1016/j.orl.2006.06.005},
    Volume = {35},
    Year = {2007},
    acmid = {2283982},
    bdsk-url-1 = {http://dx.doi.org/10.1016/j.orl.2006.06.005},
    date-added = {2014-06-10 16:45:20 +0000},
    date-modified = {2014-06-10 16:45:20 +0000},
    issue_date = {May, 2007},
    numpages = {5},
    doi = {10.1016/j.orl.2006.06.005}
}

@article{Tsitsiklis:2007:NCU:2283936.2283982, Address = {Amsterdam, The Netherlands, The Netherlands}, Author = {Tsitsiklis, John N.}, File = {NP-Hardness of Checking the Unichain Condition in Average Cost MDPs - Tsitsiklis (0) (0) - a - a - a.pdf}, ISSN = {0167-6377}, Journal = {Oper. Res. Lett.}, Keywords = {Average cost, Markov decision processes, Unichain condition}, Month = {May}, Number = {3}, Pages = {319--323}, Publisher = {Elsevier Science Publishers B. V.}, Title = {NP-Hardness of Checking the Unichain Condition in Average Cost MDPs}, URL = {http://dx.doi.org/10.1016/j.orl.2006.06.005}, Volume = {35}, Year = {2007}, acmid = {2283982}, bdsk-url-1 = {http://dx.doi.org/10.1016/j.orl.2006.06.005}, date-added = {2014-06-10 16:45:20 +0000}, date-modified = {2014-06-10 16:45:20 +0000}, issue_date = {May, 2007}, numpages = {5}, doi = {10.1016/j.orl.2006.06.005} }