Islamic Mystical Poetry - Muhyiddin Ibn Arabi Society

This is the classic work on ʿAṭṭār, which is a monumental piece of research. The Englishversion has a supplementary analyitical index put together by Berndt Radke.Hellmut Ritter 'Farīḍ al-dīn ʿAṭṭār' in The Encyclopaedia of Islam II, vol 1, pp. 752-755This give a good overview of the works and discusses their attribution.