Roman Jakobson (1962) "Why 'mama' and 'papa'?" In Jakobson, R. Selected Writings, Vol. I: Phonological Studies, pp. 538–545. The Hague: Mouton.
books.google.com
Johanna Nichols (1999) "Why 'me' and 'thee'?"Historical Linguistics 1999: Selected Papers from the 14th International Conference on Historical Linguistics, Vancouver, 9–13 August 1999, ed. Laurel J. Brinton, John Benjamins Publishing, 2001, pages 253-276.
Bancel, P.J. and A.M. de l'Etang. (2008) "The Age of Mama and Papa" Bengtson J. D. In Hot Pursuit of Language in Prehistory: Essays in the four fields of anthropology. (John Benjamins Publishing, Dec 3, 2008), pages 417-438.
Bancel, P.J. and A.M. de l'Etang. (2013) "Brave new words" In New Perspectives on the Origins of Language, ed. C. Lefebvre, B. Comrie, H. Cohen (John Benjamins Publishing, Nov 15, 2013), pages 333-377.
Schomer, Karine; McLeod, W. H. (1987). The Sants: Studies in a Devotional Tradition of India. Delhi: Motilal Banarsidass. p. 3. ISBN978-81-208-0277-3. OCLC879218858. https://books.google.com/books?id=OkKhOivXrhgC2018年11月7日閲覧. "Thus conceptually as well as etymologically, it differs considerably from the false cognate 'saint' which is often used to translate it. Like 'saint', 'sant' has also taken on the more general eithical meaning of the 'good person' whose life is a spiritual and moral exemplar, and is therefore attached to a wide variety of gurus, 'holy men', and other religious teachers."
etymonline.com
Harper, Douglas. "Pretend". The Online Etymological Dictionary. Retrieved 2015-09-14.
Schomer, Karine; McLeod, W. H. (1987). The Sants: Studies in a Devotional Tradition of India. Delhi: Motilal Banarsidass. p. 3. ISBN978-81-208-0277-3. OCLC879218858. https://books.google.com/books?id=OkKhOivXrhgC2018年11月7日閲覧. "Thus conceptually as well as etymologically, it differs considerably from the false cognate 'saint' which is often used to translate it. Like 'saint', 'sant' has also taken on the more general eithical meaning of the 'good person' whose life is a spiritual and moral exemplar, and is therefore attached to a wide variety of gurus, 'holy men', and other religious teachers."