Renzi, F., Cabass, G., Valentinoc, E. D., Melchiorria, A., & Paganod, L. (2018). The impact of primordial magnetic fields on future CMB bounds on inflationary gravitational waves. Journal of Cosmology and Astroparticle Physics, 2018(8):. doi:10.1088/1475-7516/2018/08/038.