Suzuki, Hiroyuki (December 2009). "Tibetan Dialects Spoken in Shar khog and Khod po khog". East and West. 54 (1/4): 273–283. JSTOR29757812.
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The biographies of the Tang princesses in the New Book of Tang, however, does not list a Princess Langye, so it is unclear of the exact relationship between Emperor Taizong and Princess Langye, as to whether she was a sister or an aunt. See New Book of Tang, vol. 83.[1]