in the campaign “The First Wave of Repressions Against the "Sixtiers" (1965–1968)”
Use of political trials, interrogations, and administrative pressure by the KGB on the signatories of the "Letter of 139" to create an atmosphere of fear in cultural circles: "Administrative repressions against the 'signatories' began, along with KGB pressure. Rumors spread across Kyiv and Ukraine about the existence of an underground terrorist Banderite organization run by Western intelligence services"[1].