In "American Radical:The Life and Times of I. F. Stone", 2009), D. D. Guttenplan cited Kalugin's denials in "The Nation" and in the "New York Post", although an earlier article had pointed to the possible ambiguity of the KGB's definition of the term "agent of influence." In multiple interviews, Kalugin contradicted Romerstein's allegation that Stone was a Soviet secret agent; two Stone biographers reported Kalugin's third-party denials that Stone was a Soviet secret agent. For example, Myra MacPherson ("All Governments Lie! The Life and Times of Rebel Journalist I. F. Stone", 2006) reported that Kalugin said: "We had no clandestine relationship. We had no secret arrangement. I was the press officer the Soviet embassy in Washington, D.C. ... I never paid him anything. I sometimes bought lunch."