Legally binding is only the full legalcode. For a free usage I recommend to respect the following licence conditions:
1. Provide a copy of, or the URI for, the applicable license: https://creativecommons.org/licenses/by-sa/4.0/de/legalcode,
2. the name as given above,
3. the title of the work,
4. in the case of an adaptation, a credit identifying the use of the work in the adaptation.
This license and the rights granted hereunder will terminate automatically upon any breach by you of the terms of this license. Any of the above conditions can be waived if you get permission from the copyright holder. If you have questions or wish differing conditions, please contact the copyright holder through: E-Mail via Wikipedia or my discussion page
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This work is free and may be used by anyone for any purpose. If you wish to use this content, you do not need to request permission as long as you follow any licensing requirements mentioned on this page.
The Wikimedia Foundation has received an e-mail confirming that the copyright holder has approved publication under the terms mentioned on this page. This correspondence has been reviewed by a Volunteer Response Team (VRT) member and stored in our permission archive. The correspondence is available to trusted volunteers as ticket #2020111710012656.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.