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Legally binding is only the full legalcode. For a free usage I recommend to respect the following licence conditions: 1. Provide my name as given above: Udo Grimberg, 2. a copy of, or the URI for, the applicable license: https://creativecommons.org/licenses/by-sa/3.0/de/legalcode, 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 or a higher resolution, please contact me through udogrimbergwtnet.de or my discussion page
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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.