There are Zenodo created DOIs for oemof. I believe this is a great step to make specific versions citable. However, the integration might be improved. I see three points:

• Automatic creation seems to be broken (there is no DOI for the v0.2.3 release).
• The DOI is named in the README but using the badge would make it more visible:
• The license should be named in the Zenodo record.