According to the Charaka tradition, there existed six schools of medicine, founded by the disciples of the sage Punarvasu Ātreya. Each of his disciples, Agnivesha, Bhela, Jatūkarna, Parāshara, Hārīta, and Kshārapāni, composed a Samhitā. Of all the six, the one composed by Agnivesa was most revered. According to Dr. Tustomu Yamashita, the Bhela or Bheda(la)Samhita is often quoted by later authors and commentators of Ayurveda. Some of the manuscripts of Bhela available are the Thanjavur Manuscript - a plam leaf manuscript kept in Maharaja Sarfoji's library in Thanjavur - and East Turkestan Manuscript, only one folio of a paper manuscript, now kept in Staatsbibliothek zu Berlin.