FRAUEN, Jan. Arbitrary Truths: A Structural Analysis of the Philosophical Foundations of Realism, Liberalism, and Constructivism. Global Journal of Human-Social Science Research, [S.l.], june 2019. ISSN 2249-460X. Available at: <https://socialscienceresearch.org/index.php/GJHSS/article/view/2854>. Date accessed: 18 july 2019.