The monographs "The United States at the End of the XXth Century" (1991) and "The Rise of the Dragon: The Modernization of South Korea" (1994) as well as the collection "Risks of the Transition" (1994) (in Bulgarian) dealt with these topics.
Die Monographien The United States at the End of the XXth Century (1991) und The Rise of the Dragon: The Modernization of South Korea (1994) sowie ein Sammelband Risks of the Transition (in Bulgarisch) (1994) beschäftigten sich ausführlich mit diesen Themen.