Introduction / Enderle-Burcel Gertrude, Franaszek Piotr , Stiefel Dieter, Teichova Alice // In: Gaps in the iron curtain : economic relations between neutral and socialist countries in Cold War Europe / ed. Enderle-Burcel Gertrude, Franaszek Piotr , Stiefel Dieter, Teichova Alice. - Kraków : Jagiellonian University Press, 2009. - p. 1-7. - Strona wydawcy: https://www.wuj.pl. - ISBN 978-83-233-2532-1