MediaWiki:Cite references link many format/qqq

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Parameters:

• $1 - Reference key
• $2 - Canonical numerical label for the backlink, always in the form "1.1", "1.2", and so on.
• $3 - Alternative alphabetic label for the backlink as defined via MediaWiki:cite_references_link_many_format_backlink_labels, typically "a", "b", and so on.