Zacharias, Diana Max Planck Institute for Comparative Public Law and International Law, Max Planck Society;
https://opil.ouplaw.com/view/10.1093/law:epil/9780199231690/law-9780199231690-e719?rskey=rFjSQb&result=1&prd=MPIL (Publisher version)
Zacharias, D. (2012). Holy Roman Empire. In Max Planck Encyclopedia of Public International Law, Bd. 4 (pp. 947-952). Oxford: Oxford University Press. Retrieved from http://www.mpepil.com/.