(en) « Xagħra Stone Circle » [PDF], National Inventory of the Cultural Property of the Maltese Islands,
(en) « The Xaghra Circle: (Brochtorff Circle). », Ancient Wisdom THe fieldwork was directed by Dr David Trump, Dr Caroline Malone and Dr Simon Stoddart, assisted by Prof Anthony Bonanno. A succession of student and professional volunteers assisted (see 2009 Malone et al, Mortuary Practices in Prehistoric Malta), Foundation.