Edit the references of the argument: Europe's population is aging and will decline without significant migration

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Mention in the headings below the references that support and elaborate on this argument. Add them in the section Bibliography when it is a paper text, Webliography when it is an article published on a site, Videography when it is a video available online.

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Bibliography

Author(s) Enter here the full name(s) of the author(s) of the reference in the form “First name Last name”. For each author, click on it to validate it. Tip: If an author has already been quoted, just enter the first letters of his name. You will then only have to select it from the drop-down list.
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Warning(s) If the reference poses a problem, report it by checking the corresponding box(es): Unreliable source: … Off topic : …	Insufficient quality reference Incomplete reference