@article{Trocsanyi:2013u0, author = "Trocsanyi, Zoltan and Garzelli, Maria Vittoria and Kardos, Adam", title = "{ttbar + X hadroproduction with PowHel}", doi = "10.22323/1.151.0057", journal = "PoS", year = 2013, volume = "LL2012", pages = "057" }