Sunyaev, R. A. High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;
Mushtukov, A. A., S.Tsygankov, S., Poutanen, J., Doroshenko, V., Salganik, A., Costa, E., et al. (2023). X-ray polarimetry of X-ray pulsar X Persei: another orthogonal rotator? Monthly Notices of the Royal Astronomical Society, 524(2), 2004-2014. doi:10.1093/mnras/stad1961.