唯識二十論The Weishi ershi lun; Viṃśatikā vijñapti-mātratā-siddhiḥ, Vimsatikā-vṛtti (Twenty Verses on Consciousness-only). T 1590.31.74-77. By Vasubandhu 世親, translated in 661 by Xuanzang 玄奘. There are also translations by Prajñāruci (唯識論) and Paramārtha (大乘唯識論). This was one of Vasubandhu's most philosophically important Yogācāra works, which refutes the realism of the non-Buddhist and pre-Mahāyāna schools.