@article{SIGMA_2021_17_a102,
     author = {Francis Brown},
     title = {Invariant {Differential} {Forms} on {Complexes} of {Graphs} and {Feynman} {Integrals}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2021},
     volume = {17},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a102/}
}