@article{SIGMA_2011_7_a93,
     author = {Jo\~ao Faria Martins and Aleksandar Mikovi\'c},
     title = {Four-Dimensional {Spin} {Foam} {Perturbation} {Theory}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2011},
     volume = {7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2011_7_a93/}
}