In the Service of "the People" and of the"Socialist Community" : The Loyalties of Military Elites in the Polish People's Republic and the German Democratic Republic (1970-1990) - Boysen, Jens (. Exploring loyalty. - Göttingen : Vandenhoeck & Ruprecht, [2017]. - VI, 240 Seiten. - Illustrationen. - ISBN 3-525-37317-1, 2017)