1. https://en.wikipedia.org/wiki/Rasmus_Bartholin
2. Horvath, G., https://arago.elte.hu/sites/default/files/DSc-Thesis-2003-GaborHorvath-01.pdf, (2003)
3. Detection of X-Ray Polarization of the Crab Nebula;Novick,1972
4. IXPE: Imaging X-Ray Polarimetry Explorer Mission;Deininger,2017
5. Polarization studies with NuSTAR;Lotti,2012