Jean Druel, « Why is it difficult to date when qalqala became unintelligible to Qurʾānic reciters and grammarians? », Arabica 62, 2015, p. 19‒52.
Jean Druel, « Why is it difficult to date when qalqala became unintelligible to Qurʾānic reciters and grammarians? », Arabica 62, 2015, p. 19‒52.