in the months that followed the coup, the "junta", with authoring work by historian gonzalo vial and admiral patricio carvajal, published a book titled "el libro blanco del cambio de gobierno en chile" (commonly known as "el libro blanco", "the white book of the change of government in chile"), where they attempted to justify the coup by claiming that they were in fact anticipating a self-coup (the alleged "plan zeta", or plan z) that allende's government or its associates were purportedly preparing. historian peter winn states that the central intelligence agency had an extensive part to play in fabricating the conspiracy and in selling it to the press, both in chile and internationally. although later discredited and officially recognized as the product of political propaganda, gonzalo vial has pointed to the similarities between the alleged plan z and other existing paramilitary plans of the popular unity parties in support of its legitimacy.