1. University of Pennsylvania, Ms. Coll 390, Item 917 Title: Taittirīyopaniṣadbhāṣyavārttika Author: Ādi Shankara Date: 1792.
2. University of Pennsylvania, Ms. Coll 390, Item 1028 Title: Taittirīyopaniṣadbhāṣyavārttika Author: Sureśvarācārya Date: circa 1700-1850.