From the founding of OSPAAAL and Tricontinental in 1966 until the dissolution of the Soviet Union, which led to a rapid recession in the Cuban economy, propaganda posters were folded up and placed inside copies of the magazine, however, this was stopped, along with publication of Tricontinental, due to ink shortages and financial trouble.
In 1967, he and Rudi Dutschke translated Che Guevara's "Message to the Tricontinental" into German, for which they wrote an introduction.