Komatsu, Eiichiro Physical Cosmology, MPI for Astrophysics, Max Planck Society;
Kunze, K., & Komatsu, E. (2015). Constraints on primordial magnetic fields from the optical depth of the cosmic microwave background. Journal of Cosmology and Astroparticle Physics, 2015(6): 027, pp. 1-14. doi:10.1088/1475-7516/2015/06/027.