SAMI MOUBAYED (2017年1月29日). “Is Syria’s Idlib being groomed as Islamist killing ground?”. タイム誌アジア版. 2018年12月26日閲覧。"Last January, Idlib sank into a "rebel civil war" as fighting broke out between Jabhat al-Nusra and the Turkish-backed Ahrar al-Sham, a militia in the Syrian north that boasts of a powerbase of at least 20,000 fighters."
Charles Lister (2017年3月15日). “Al Qaeda Is Starting to Swallow the Syrian Opposition”. Foreign Policy. 2018年12月26日閲覧。 "HTS and Ahrar al-Sham are the most militarily powerful, with the former likely commanding 12,000 to 14,000 fighters and the latter closer to 18,000 to 20,000."
Aaron Y Zelin (2017年6月). “How Al Qaeda survived drones, uprisings and the Islamic State”. Washington Institute for Near East Policy. 2018年12月26日閲覧。"Overnight [after its January 2017 expansion], Ahrar al-Sham had gained approximately 8,000 additional fighters to supplement its already large membership of 12,000."
