There is no definitive version of his collected works (or "Dīvān"); editions vary from 573 to 994 poems. Only since the 1940s has a sustained scholarly attempt (by Mas'ud Farzad, Qasim Ghani and others in Iran) been made to authenticate his work and to remove errors introduced by later copyists and censors. However, the reliability of such work has been questioned, and in the words of Hāfez scholar Iraj Bashiri, "there remains little hope from there (i.e.: Iran) for an authenticated diwan".