Gemeinverständlich, Vieweg, Braunschweig Fierz, M. and Pauli, W. (1939) On relativisticwaveequations for particles of arbitrary spin in an electromagnetic field.
(页面存档备份,存于互联网档案馆) Gives the relativistic multipole moments for the Ernst vacuums (plus the electrogmagnetic and gravitational relativistic multipole moments for