CHAPTER I HISTORY OF THE EVENTS, CHAPTER II CONSEQUENCES OF THE SICILIAN VESPERS, CHAPTER III: THE ETHNOLOGICAL SITUATION IN SICILY AT THE TIME, CHAPTER IV: THE SICILIAN VESPERS—IDENTITY REVOLT OR ECONOMIC REBELLION?, CHAPTER V: THE SICILIAN LANGUAGE & THE SICILIAN IDENTITY, CHAPER VI. THE ETHNOLOGICAL SITUATION IN THE REST OF SOUTHERN ITALY, Sources .
STEFANOS SOTIRIOU (Tue,) studied this question.