Sabah Sobhi Hayder, و Sherwan Hashm Adil. "The Nation´S Referendum for Independence (The South of Sudan´S Instance- Catalonia´S Instance): Comparative Political Research". QALAAI ZANIST JOURNAL, م 6, عدد 3, سبتمبر، 2021, ص 107-43, doi:10.25212/lfu.qzj.6.3.04.