Mandukya Upanishad (English Wikipedia)

Nanditha Krishna (2010). Sacred animals of India. India: Penguin books. pp. 144–145. ISBN 9780143066194. Retrieved March 11, 2015.
Rama 2007, p. 3-4. Rama, Swami (2007), OM the Eternal Witness: Secrets of the Mandukya Upanishad (Prakash Keshaviah PHD ed.), India: Himalaya Institute hospital trust, ISBN 978-81-88157-43-3, retrieved March 11, 2015
KN Jayatilleke (2010), Early Buddhist Theory of Knowledge, ISBN 978-8120806191, pages 246-249, from note 385 onwards;
Steven Collins (1994), Religion and Practical Reason (Editors: Frank Reynolds, David Tracy), State Univ of New York Press, ISBN 978-0791422175, page 64; Quote: "Central to Buddhist soteriology is the doctrine of not-self (Pali: anattā, Sanskrit: anātman, the opposed doctrine of ātman is central to Brahmanical thought). Put very briefly, this is the [Buddhist] doctrine that human beings have no soul, no self, no unchanging essence.";
Edward Roer (Translator), Shankara's Introduction, p. 2, at Google Books, pages 2-4
Katie Javanaud (2013), Is The Buddhist 'No-Self' Doctrine Compatible With Pursuing Nirvana?, Philosophy Now
Izzo, David Garrett (2009). The Influence of Mysticism on 20th Century British and American Literature. McFarland. p. 18. ISBN 9780786441068. Retrieved March 16, 2015.

doi.org

R. V. De Smet (1972), Early Trends in the Indian Understanding of Man, Philosophy East and West, Vol. 22, No. 3 (Jul., 1972), pages 259-268
Mark B. Woodhouse (1978), Consciousness and Brahman-Atman, The Monist, Vol. 61, No. 1, Conceptions of the Self: East & West (JANUARY, 1978), pages 109-124
Guy Rickards (2002), David Stoll Record Reviews, Tempo New Series, Cambridge University Press, No. 222, page 53 column 1

D. Sonde, Nagesh. Sri Madhva Mandukya Upanishad (PDF). India. pp. 1–5. Retrieved March 3, 2015.

KN Jayatilleke (2010), Early Buddhist Theory of Knowledge, ISBN 978-8120806191, pages 246-249, from note 385 onwards;
Steven Collins (1994), Religion and Practical Reason (Editors: Frank Reynolds, David Tracy), State Univ of New York Press, ISBN 978-0791422175, page 64; Quote: "Central to Buddhist soteriology is the doctrine of not-self (Pali: anattā, Sanskrit: anātman, the opposed doctrine of ātman is central to Brahmanical thought). Put very briefly, this is the [Buddhist] doctrine that human beings have no soul, no self, no unchanging essence.";
Edward Roer (Translator), Shankara's Introduction, p. 2, at Google Books, pages 2-4
Katie Javanaud (2013), Is The Buddhist 'No-Self' Doctrine Compatible With Pursuing Nirvana?, Philosophy Now

maNDUka Monier-Williams' Sanskrit-English Dictionary, Cologne Digital Lexicon, Germany
mANDUka Monier-Williams' Sanskrit-English Dictionary, Cologne Digital Lexicon, Germany

Charles Johnston, The Measures of the Eternal - Mandukya Upanishad Theosophical Quarterly, October, 1923, pages 158-162