PŘIKRYL, Pavel. Why Peacekeeping in South Sudan Failed. Development, Environment and Foresight, [S.l.], v. 4, n. 1, p. 4-25, nov. 2019. ISSN 2336-6621. Available at: <http://def-journal.eu/index.php/def/article/view/57>. Date accessed: 06 dec. 2019.