Rajeshwari Pandharipande.Marathi: Descriptive grammars (неопр.). Psychology Press, 1997. — «... ...». Дата обращения: 6 ноября 2018. Архивировано 5 апреля 2015 года.
Colin P. Masica.The Indo-Aryan Languages (неопр.). Cambridge University Press, 1993. — «... The symmetrical ten-vowel system of Hindi and Punjabi (/i, I, e, æ; a, ə; u, U, o, ɔ/ - often represented as /ï, i, e, ai; ā, a; ū, u, o, au/) is considered the normative NIA system ... The diphthongs ai, au coventionally counted as part of the Sanskrit inventory of "vowels" (though not of NIA inventories, being properly relegated to the category of diphthongs), are monophthongized to æ, ɔ in these languages, although in eastern (i.e. Bihari) pronunciations of common Hindi (and in some acrolectal pronunciations of tatsamas) a diphthongal element is retained ...». Дата обращения: 6 ноября 2018. Архивировано 11 января 2014 года.
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Rajeshwari Pandharipande.Marathi: Descriptive grammars (неопр.). Psychology Press, 1997. — «... ...». Дата обращения: 6 ноября 2018. Архивировано 5 апреля 2015 года.
Colin P. Masica.The Indo-Aryan Languages (неопр.). Cambridge University Press, 1993. — «... The symmetrical ten-vowel system of Hindi and Punjabi (/i, I, e, æ; a, ə; u, U, o, ɔ/ - often represented as /ï, i, e, ai; ā, a; ū, u, o, au/) is considered the normative NIA system ... The diphthongs ai, au coventionally counted as part of the Sanskrit inventory of "vowels" (though not of NIA inventories, being properly relegated to the category of diphthongs), are monophthongized to æ, ɔ in these languages, although in eastern (i.e. Bihari) pronunciations of common Hindi (and in some acrolectal pronunciations of tatsamas) a diphthongal element is retained ...». Дата обращения: 6 ноября 2018. Архивировано 11 января 2014 года.