Tibetans helped him, in 643, to overthrow the usurper Viṣṇugupta, and restored the Licchavi dynasty to the throne. Lewis, Chronology, p. 152.
Kamal P. Malla, Mānadeva Samvat: An Investigation into an Historical Fraud, Contributions to Nepalese Studies, vol. 32, no. 1 (Jan 2005), pp. 1-49, at p. 37.