- https://commons.wikimedia.org/wiki/File:Day_foto.jpg (Uploaded by Dəyanət osmanlı)
- https://commons.wikimedia.org/wiki/File:Newton-avant1700.jpg (Uploaded by Martin Dupont IEM)
- https://commons.wikimedia.org/wiki/File:Circuit_avec_l%27%C3%A9lectroaimant.jpeg (Uploaded by Martin Dupont IEM)
Cross-wiki-uploader added:
author=[[User:null|null]]
instead of attributing the user. No-one is named null, os there must be a bug in the uploading system which creates attribution problems.