@article{Kleinschmidt:20103S, author = "Kleinschmidt, Tobias and Kilian, Wolfgang", title = "{Using Feynman's Tree Theorem to Evaluate Loop Integrals Numerically}", doi = "10.22323/1.092.0024", journal = "PoS", year = 2010, volume = "RADCOR2009", pages = "024" }