1. Abbati M.C., Cirelli R., Mania A., Michor P.: Smoothness of the action of the gauge transformation group on connections. J. Math. Phys. 27, 2469 (1986)
2. Abbati M.C., Cirelli R., Mania A.: The orbit space of the action of the gauge transformation group on connections. J. Geom. Phys. 6, 537 (1989)
3. Becker, C., Schenkel, A., Szabo, R.J.: Differential cohomology and locally covariant quantum field theory. arXiv:1406.1514 [hep-th]
4. Belov, D., Moore, G.W.: Holographic action for the self-dual field. arXiv:hep-th/0605038
5. Benini, M.: Optimal space of linear classical observables for Maxwell k-forms via spacelike and timelike compact de Rham cohomologies. arXiv:1401.7563 [math-ph]