This page has issues, it was apparently copied badly from some source, probably an older version of the en.wikipedia.org page. Unfortunately, the references were copied as plain text, so the page has footnotes references, but no footnotes.
The footnotes appear in the older versions of the main en page. I haven't figure out which revision this was copied from, but the references could be copied from there.
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@Chenzw: This article has quite clearly been obviously copy-pasted from English Wikipedia. Was there a particular reason for not A3ing it? It may be better to overwrite and start freshly. Naleksuh (talk) 06:40, 16 June 2020 (UTC)