E. B. Cowell, The Kaushîtaki-brâhmana-upanishad, edited with an English translation; Bibliotheca Indica. Calcutta, 1861.
E. B. Cowell, The Maitri Upanishad, edited with an English translation; Bibliotheca Indica. Calcutta, 1870.
A. Weber, Die Vagrasûkî des Asvaghosha. Berlin, 1860.
A. Weber, Die Râma-tâpanîya Upanishad. Berlin, 1864.
A. Weber, Analyse der in Anquetil du Perron's Übersetzung enthalten Upanishad; Indische Studien, vol. i, p. 247 et seq.
A. E. Gough, The Philosophy of the Upanishads; Calcutta Review, CXXXI.
P. Regnaud, Matériaux pour servir à l'histoire de la Philosophic de l'Inde. Paris, 1876.
Editions of the Upanishads, their commentaries and glosses have been published in the Tattvabodhinî patrikâ, and by Poley (who has also translated several Upanishads into French), by Röer, Cowell, Rajendralal Mitra, Harakandra Vidyâbhûshana, Visvanâtha Sâstrî, Râmamaya Tarkaratna, and others. For fuller titles see Gildemeister, Bibliotheca Sanscrita, and E. Haas, Catalogue of Sanskrit and Pali Books in the British Museum, s. v. Upanishads.
