Volker Krause, J. David Singer „Minor Powers, Alliances, And Armed Conflict: Some Preliminary Patterns“, in „Small States and Alliances“, 2001, pp 15-23, ISBN 978-3-7908-2492-6 (Print) ISBN 978-3-662-13000-1 (Online) [1]
tandfonline.com
Brett Leeds , Jeffrey Ritter, Sara Mitchell, Andrew Long, „Alliance Treaty Obligations and Provisions, 1815–1944“, „International Interactions: Empirical and Theoretical Research in International Relations“, 2002, vol. 28, issue 3, p. 237–260, DOI: 10.1080/03050620213653 [2]