Presentation The Solidarity Phenomenon (PL, EN, DE, FR, ES, RU) Solidarity 25th Anniversairy Press Center International Conference 'From Solidarity to Freedom'
[2022-05-28]. (原始内容存档于2022-05-28). Tanja R. Müller, "Legacies of Socialist Solidarity" Colin Legum, Africana Publishing Company, 1982, Africa Contemporary Record: