This view recently has been challenged. See Johannes L. Kurz "Boni in Chinese Sources: Translations of Relevant Texts from the Song to the Qing Dynasties", paper accessible under http://www.ari.nus.edu.sg/article_view.asp?id=172 (2006)
pnri.go.id
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"Naskah Nagarakretagama" (dalam bahasa Indonesian). Perpustakaan Nasional Republik Indonesia. Diarkibkan daripada yang asal pada 23 May 2017. Dicapai pada 13 October 2014.CS1 maint: unrecognized language (link)
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"Naskah Nagarakretagama" (dalam bahasa Indonesian). Perpustakaan Nasional Republik Indonesia. Diarkibkan daripada yang asal pada 23 May 2017. Dicapai pada 13 October 2014.CS1 maint: unrecognized language (link)