Bṛhatkathā. This work, composed in Paiśācī, no longer survives, but is believed to have been plundered to create some other texts. Its characters include Udayana, Naravāhanadatta. Citations in Sukṛtidatta Panta's Kārtavīryodaya, etc.
Muktak Aklujkar, Was a Full Recension of the Bṛhatkathā Available in Nepāla in the 19th Century? Journal of the Nepal Research Centre, vol. 12 (2000), pp. 1-4.
Kamal P. Malla, The Nepālamahātmya: A IX-Century Text or a Pious Fraud? Contributions to Nepalese Studies, vol. 19, no. 1 (January 1992), pp. 145-157, at p. 151.