What did a recent research paper claim?

最近的一篇研究论文是怎么说的？

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This paper questions the validity of the claim that "intra-sentential cataphoric reference is unidirectional".

本文对“句内后照应单向性”这一论点的有效性提出质疑。

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This paper questions the validity of the claim that intra-sentential cataphoric reference is unidirectional.

本文对“句内后照应单向性”论点的有效性提出质疑。

youdao

The result, they claim in a paper that will appear this month in the Journal of Physical Chemistry, is a nanofibre material with an extremely high ratio of surface-area to volume.

ECONOMIST: Space-age soot

The BBC confirmed that the claim came from a 2006 paper by the Working Group on Climate Change.

BBC: Africa TV series edited over climate change comment

One item is a claim form from a journalist on this paper back from a trip to America a century ago.

ECONOMIST: Inflation since 1900