“Abhidhamma-avatāra. ‘An Introduction to Abhidhamma’, being the title of a treatise on *Abhidharma (Pāli, Abhidhamma) composed in *India by *Buddhadatta. The work is mostly in verse and comparable to the *Visudhimagga of Buddhaghoṣa, whom Buddhadatta is said to have met. Two sub-commentaries (ṭīkās) exist, one by Vācissara Mahāsāmi and the other by Sumaṇgala.” (PDoB)
Fair Use Source: B00F8MIIIG PDoB