1973. ‘buddhist "jhāna:" its nature and attainment according to the pali sources’, "religion", 3, pp. 115–31: a key early study of this meditative state central to "samatha" meditation, with which he was greatly involved. (a paper of the same title also appears in "medagoda sumanatissa felicitation volume", ed. d. dorakuṇḍura, c. wikramagamage and a. guṇasiṃha, colombo, medagoda sumanatissafelicitation committee, 1996, pp. 105–116.)