%0 Journal Article %A João Faria Martins %A Aleksandar Miković %T Four-Dimensional Spin Foam Perturbation Theory %J Symmetry, integrability and geometry: methods and applications %D 2011 %V 7 %U http://geodesic.mathdoc.fr/item/SIGMA_2011_7_a93/ %G en %F SIGMA_2011_7_a93