Michael Riegner é Professor Assistente da University of Erfurt, na Alemanha. Pesquisador Principal do Projeto Varieties of Constitutionalism. 

e. michael.riegner@uni-erfurt.de 

Twitter/X. @riegnerm

site. https://www.uni-erfurt.de/en/faculty-of-economics-law-and-social-sciences/fields-of-study/law/administrative-law-and-public-international-law/prof-dr-michael-riegner-llm-nyu