Beck, A. M. Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;
Beck, A. M., Hanasz, M., Lesch, H., Remus, R.-S., & Stasyszyn, F. A. (2013). On the magnetic fields in voids. Monthly Notices of the Royal Astronomical Society Letters, 429(1), L60-L64. doi:10.1093/mnrasl/sls026.