Some of the earliest Yogācāra material can be found in the "Yogācārabhūmi-śāstra," such as the doctrines of "ālayavijñāna and āśrayaparāvṛtti." This text, a massive encyclopedic work on yogic praxis, is traditionally attributed to Asaṅga (4th century) or Maitreya, but most scholars (such as Schmithausen and Aramaki) believe it contains the work of many authors, and its components reflect various stages of historical development. Most of its material is non-Mahayana and according to Lusthaus, it draws extensively from on the Āgamas. Nevertheless, Asaṅga may still have influenced its development.