V. Kostytsky, Mychailo, Nataliia V. Kushakova-Kostytska, Vitalii M. Kravets, Oleg V. Pavlyshyn, y Olena Y. Kovtun. «Parliamentary-Presidential or Presidential-Parliamentary Republic As Modes of One Political Model or Different Concepts of Government». Revista San Gregorio 1, no. 42 (diciembre 17, 2020). Accedido mayo 18, 2024. http://revista.sangregorio.edu.ec/index.php/REVISTASANGREGORIO/article/view/1551.