Nakamura, p. 341 note. An Indian, alias Śūnyadiśya, he composed a poetical inscription at a Korean temple.
Subrahmanyam, VBC, p. 70. This Korean inscription is dated 1378 CE.
His Chinese biography was studied in A. Waley, New Light on Buddhism in Medieval India, Mélanges chinoise et bouddhiques, vol. 1 (1932), pp. 355-376. This reference was drawn from Arthur McKeown's dissertation (see especially his p. 27 ff., source of the date given above, which seems to create a problem with the dating of the inscription. It would also be possible to re-Sanskritize the Chinese form of his name as the less unusual name Jñānabhadra).