Velo, G., & Wightman, A. S. (1978). Invariant Wave Equations: Proceedings of the "Ettore Majorana" International School of Mathematical Physics Held in Erice, June 27 to July 9, 1977. Springer. https://doi.org/10.1007/BFb0032327
Chicago Style (17th ed.) CitationVelo, Giorgio, and A. S. Wightman. Invariant Wave Equations: Proceedings of the "Ettore Majorana" International School of Mathematical Physics Held in Erice, June 27 to July 9, 1977. Berlin [u.a.]: Springer, 1978. https://doi.org/10.1007/BFb0032327.
MLA (9th ed.) CitationVelo, Giorgio, and A. S. Wightman. Invariant Wave Equations: Proceedings of the "Ettore Majorana" International School of Mathematical Physics Held in Erice, June 27 to July 9, 1977. Springer, 1978. https://doi.org/10.1007/BFb0032327.
Warning: These citations may not always be 100% accurate.