“... and documentary research and visits to institutional sites, using as theoretical reference Hans Kelsen, Robert...”
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“... of the lectures by Heinrich Triepel and Hans Kelsen given at the The Hague Academy of International Law (dualism...”
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“... nocontradiction principle, according Hans Kelsen and Lourival Vilanova thought, doing a philosophical reflection...”
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“... theory of Hans Kelsen, and was adopted by the Austrian Constitution of 1920. According to the abstract...”
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