ドイツ・ポーランド不可侵条約
en:Piotr Stefan Wandycz著, The twilight of French eastern alliances. 1926-1936. French-Czecho-Slovak-Polish relations from Locarno to the remilitarization of the Rheinland., Princeton University Press, 1988 (republished in 2001). ISBN 1-59740-055-6