Supergravity was discovered by D.V. Volkov and V.A. Soroka in 1973, wasn't it?
arXiv:1910.03259 · doi:10.26565/2312-4334-2019-3-10
Abstract
Supergravity is a remarkable theory combining supersymmetry and general relativity. While the theory has many developers from across the globe, we wish to address the question who were the real originators of this fantastic idea.
arXiv comment2 pages, v.2: the information about S. Deser and B. Zumino (1976) is added (by request of its first author), minor corrections