Crumley, J. S. (2022). Introduction to metaphysics. Broadview Press
[Citing Place (1956)]  
Citing Place (1956) in context (citations start with an asterisk *):
p. 191
* In the mid- and late1950s, Ullin Place and his professor J.J.C. Smart published papers explaining and defending versions of the identity theory; the two are generally credited with originating the modern identity theory.