On the charge distribution of static axial and mirror symmetric monopole systems Houston, P.; O'Raifeartaigh, L. — 1980 Abstracta. 8th Winter School on Abstract Analysis
Covariant wave-equations, the Galilei group, and the magnetic moment of the electron U. Niederer; L. O'Raifeartaigh — 1977 Annales de l'I.H.P. Physique théorique