The The Try-asvabha^va-prakaran!a （Sanwuxing lun）， or Treatise on the Three Non-natures; translated by Parama^rtha 真谛. 2 fascicles， T 1617.31.867-878. A work that focuses on the doctrine of the three non-natures in the Yoga^ca^ra system. It is usually attributed to either Asan%ga 无著 or Vasubandhu 世亲.