According to N. Ross Reat, all of these doctrines are shared by the Theravada Pali texts and the Mahasamghika school's "Śālistamba Sūtra". A recent study by Bhikkhu Analayo concludes that the Theravada "Majjhima Nikaya" and Sarvastivada "Madhyama Agama" contain mostly the same major doctrines. Richard Salomon, in his study of the Gandharan texts (which are the earliest manuscripts containing early discourses), has confirmed that their teachings are "consistent with non-Mahayana Buddhism, which survives today in the Theravada school of Sri Lanka and Southeast Asia, but which in ancient times was represented by eighteen separate schools."