Paper:

"Shi‘ite Authorities in the Age of Minor Occultation, Part II" Written by Zabihzadeh, Ali Naghi

Both Ali ibn Bābiwayh and Kulayni played a crucial role during minor occultation of Imam Mahdi (aj) along with the four Specifically Appointed Deputies of Imam (a) and they both passed away at the end of the minor occultation.