Ritoók 1993 usefully distinguishes between three types of stories about the ‘Pisistratid recension’ and shows how the tradition of the Pisistratid recension developed over time.
Ritoók, Z. 1993. “The Pisistratus Tradition and the Canonization of Homer.” Acta Antiqua Academiae Scientiarum Hungaricae 34: 39–53.