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Use case

Find sources for every claim as you write

Put the cursor in a sentence, click once, and Papero searches scholarly papers for it. Cite the one that fits without leaving your document.

Cite

Short sleep lowers exam scores.

Search papers or paste a DOI

RelevancePublished from 2015Cited by 20+

Papers for the sentence you are writing

Okafor & Lindqvist, 2022 · cited 48 timesScores fell by 9% after nights under six hours.Cited
Marchetti et al., 2021 · cited 112 timesCite
Tanaka & Brooks, 2023 · cited 310 timesCite
The cite box after one click on Find papers for this sentence, from the example review on sleep and memory.

Does this sound like you?

  1. You know the claim is right but cannot find the paper that says it.

    How Papero helps: One click finds papers for the sentence you are writing.

  2. Every search means leaving your draft and losing your place.

    How Papero helps: Paste a DOI, PMID, arXiv ID or ISBN and Papero fills in the reference.

  3. You find out a source was retracted only after you have cited it.

    How Papero helps: Retracted papers and preprints are marked before you cite them.

The guide

How to find good sources for your claims

Most writing that needs citations gets stuck on the same question: who said this first, and where? You know the claim is right, you half remember the paper, and the search box gives you two pages of results that almost fit.

Searching outside the document breaks the flow. You copy the sentence into a search engine, open papers in new tabs, then come back and try to remember which one you meant to cite.

What counts as a scholarly source

A scholarly source is written by researchers for researchers and checked before publication: peer-reviewed journal articles, academic books and conference papers. Preprints are research shared before peer review, so they can be useful and recent, but they deserve a note of caution.

For every claim that is not common knowledge, your reader should be able to follow a citation to evidence. The goal is not more citations but the right one: the source that actually supports the sentence it sits in.

Three ways to search

Good searches combine all three.

  • Keyword searchKey terms and their synonyms. Fast, but it only finds papers that use your words.
  • Backward chasingRead the reference list of a strong paper to find what it built on.
  • Forward chasingSee who cited a strong paper since, to find newer work and replies.

Step by step

  1. Claim
  2. Keywords
  3. Search
  4. Judge
  5. Cite

Write the claim first, in one sentence. Pick out the two or three terms that carry its meaning and try synonyms for each. Search, then skim titles and abstracts for papers that test your claim rather than mention it in passing.

Judge each candidate: where it was published, whether it was peer reviewed, whether it has been retracted, and whether its findings really match your sentence. Then cite it in the sentence it supports, not in a pile at the end of the paragraph.

Common mistakes

  • Avoid: Citing a paper from its abstract alone

    Do: Read the part that supports your claim

  • Avoid: Ignoring retractions and preprints

    Do: Check the status before you cite

  • Avoid: One weak source for a big claim

    Do: Back strong claims with strong, independent evidence

A worked example

Worked example
Claim: students who sleep less remember less of what they studied the day before. Three candidates come back: a peer-reviewed study that measured recall directly, a preprint with a small sample, and a review that mentions the link in one sentence.
Why it works: the first paper tests the claim, so it is the one to cite. The preprint can support it with a caution, and the passing mention in the review adds nothing.

The usual way vs with Papero

The usual way: Copy the sentence into a search engine and open a dozen tabs.

With Papero: Click once in the sentence and see papers found for it.

The usual way: Type the reference details in by hand.

With Papero: Paste a DOI, PMID, arXiv ID or ISBN and Papero fills them in.

The usual way: Learn about a retraction after you have cited the paper.

With Papero: See retracted papers and preprints marked before you cite.

How it works

  1. Start from the sentence

    Put the cursor in the sentence that needs a source and choose Find papers for this sentence.

  2. Pick a paper

    Sort and filter the results, read the details and choose the paper that supports the claim.

  3. Cite in place

    Papero inserts the in-text citation in your style and adds the paper to your references. Several sources can share one citation.

  4. Check the whole draft

    Run the claims check in Review to find sentences that still need a source.

What you get

  • Find papers for this sentence

    A search built from the sentence you are on, with sort and filters, inside the document.

  • Lookup by identifier

    Paste a DOI, PMID, arXiv ID or ISBN, or add a source by hand when it has none.

  • Retraction and preprint flags

    Search results mark retracted papers and preprints, and the source check in Review flags them again before you hand in.

  • Accept and cite

    Accept an autocomplete suggestion, then let Papero find papers for that sentence straight away.

Where Papero stops

Papero finds candidate papers, but it cannot tell you that a paper supports your claim. Read the abstract or the paper before you cite it.

Who it is for

Questions people ask first

Where do the papers come from?

From OpenAlex, an open catalogue of more than 250M scholarly works. You can also cite sources from your library or add one by DOI, PMID, arXiv ID or ISBN.

Can Papero make up a citation?

No. A citation in Papero is a paper from your library, one you added or one Papero found in OpenAlex. Papero never invents a reference to fill a gap.

Does it flag retracted papers?

Yes. Search results mark retracted papers and preprints, and the source check in Review flags cited papers that are retracted, preprints, rarely cited or could not be checked.

Is finding sources free?

Yes. Search, lookup and in-text citations work on the free plan. On Free the reference list shows your real entries blurred; Plus makes it readable, copyable and exportable.

Can I save a paper without citing it?

Yes. Every result has a Save button, and the Find papers page lets you search and save outside any document.

What counts as a scholarly source?

Usually peer-reviewed journal articles, academic books and conference papers. Preprints can be useful but have not been peer reviewed yet, so say so when you cite one.

How do I know a source is reliable?

Check where it was published, whether it was peer reviewed, whether it has been retracted and whether other researchers cite it. Then read it: the abstract can hide the limits of a study.

Can I cite a paper after reading only the abstract?

It is risky. Abstracts compress findings and leave out limits, so your sentence may claim more than the paper shows. Read at least the parts that support your claim.

Write it with sources you can check

Start free, no card needed. Move to Plus only when you want the full reference list and higher limits.