All contents published at this site are provided "AS IS" without any warranty.

This site is a collaborative community project; all its contents are licensed under CC BY-SA 4.0.

We do not own the copyright to most images used on this website. We believe that most of them are either in the public domain or (provided you use them on a website) you are unlikely to encounter any difficulty.

However, if you wish to use them in any other way - in "paper" publishing or on other media - we cannot rule out outstanding copyright problems.

In case you believe you are a copyright owner of content we wrongly derived and published under CC BY-SA 4.0, please get in touch with us in Github discussions, so we can verify and possibly resolve your issues.