Hendrik Simon: The Myth of Liberum Ius ad Bellum: Justifying War in 19th-Century Legal Theory and Political Practice. In: European Journal of International Law. Band29, Nr.1, 8. Mai 2018, ISSN0938-5428, S.113–136, doi:10.1093/ejil/chy009 (oup.com [abgerufen am 30. Dezember 2019]).
Klaus Reblin: Franziskus von Assisi. Der rebellische Bruder. Vandenhoeck & Ruprecht, Göttingen 2006, S. 55ff.
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Hendrik Simon: The Myth of Liberum Ius ad Bellum: Justifying War in 19th-Century Legal Theory and Political Practice. In: European Journal of International Law. Band29, Nr.1, 8. Mai 2018, ISSN0938-5428, S.113–136, doi:10.1093/ejil/chy009 (oup.com [abgerufen am 30. Dezember 2019]).
Hendrik Simon: The Myth of Liberum Ius ad Bellum: Justifying War in 19th-Century Legal Theory and Political Practice. In: European Journal of International Law. Band29, Nr.1, 8. Mai 2018, ISSN0938-5428, S.113–136, doi:10.1093/ejil/chy009 (oup.com [abgerufen am 30. Dezember 2019]).