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A single Mid-Pleistocene long-distance dispersal by a bird can explain the extreme bipolar disjunction in crowberries ( <i>Empetrum</i> )

https://doi.org/10.1073/pnas.1012249108
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44/44 checkable references clean · checked 2026-07-22

Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a retraction, withdrawal, or removal notice.

14 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.

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The 14 references without a DOI — listed, not checked
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no DOI — not checkedJAA Nylander MrAIC.pl (http://www.abc.se/~nylander). (2004).
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no DOI — not checkedOW Johnson, PG Connors The Birds of North America Online, ed A Poole (Cornell Lab of Ornithology, Ithaca, NY, 1996).
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What this badge says. CiteStamped means the CHECKABLE references of this work were clean at the dated check: each resolved to a known work in a public registry, and none carried a retraction notice at that time. It says nothing about the quality, findings, or importance of the work itself, and nothing about references deposited without a DOI.

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