The surveyed Wikipedia article documents a 1982 empirical study (Katz and Allen) providing evidence for the syndrome, but states no year for when the phenomenon or term was first named or described.
What would resolve this A citation to the earliest source naming or describing the not invented here syndrome, distinct from the 1982 Katz and Allen study already cited as empirical evidence.
Openhistory of psychologyWikipedia: Not invented here