1. Gauge internal symmetry in extended supergravity
2. E.S. Fradkin and M.A. Vasiliev, Lebedev Inst., preprint (1976)
3. N = 4 supergravity theory with local SU(2) × SU(2) invariance
4. E. Cremmer, J. Schark and S. Ferrara, unpublished
5. S.J. Gates and B. Zwiebach, Gauged N = 4 supergravity theory with a new scalar potential, Caltech preprint, CALT-68-969