You are writing up your research and wonder if you should cite a particular software package that you used.

Should you cite this particular piece of software?

1. Does the software ask you to cite it?

If yes, then do so following their guidelines.
If no, then continue to question 2
If you don't know:
- Check for a file name CITATION or similar in the root directory of the software.
- Check the README for the software, their website, and any output from running it.
- Search the web for citation instructions: "How to cite 'software name'?".
- Check download page.
- Email the authors, open an issue in their issue tracker, or ask on a user support forum. While waiting for a response continue to question 2.

2. Did the software play a critical part in, or contributed something unique to, your research?

Hint: If you extend, script or automate the software, then you should cite the code.

If yes, then you must cite the software.
If not, or if you don't know, continue to question 3.

3. Did the software manipulate or create your data? This includes storage, visualization, and communication of your data and results.

If yes, then you need to cite the software.
If not, or if you don't know, continue to question 4

4. Do the authors of the software rely on academic credit for funding? Look for academic institutions in email addresses, URLs.

If yes, then you must cite the software.
If not, then you don't have to cite the software.

http://bit.ly/shouldacite

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