Duchhardt, H. From the Peace of Westphalia to the Congress of Vienna: Heinz Duchhardt. The Oxford handbook of the history of international law.(2012).

Duchhardt, Heinz. "From the Peace of Westphalia to the Congress of Vienna: Heinz Duchhardt." The Oxford Handbook of the History of International Law.(2012) .

Duchhardt, Heinz. "From the Peace of Westphalia to the Congress of Vienna: Heinz Duchhardt." The Oxford Handbook of the History of International Law.(2012), .