For a free usage I recommend to respect the following license conditions: 1. Provide my name as given above: Martina Nolte, 2. a copy of, or the URI for, the applicable license: https://creativecommons.org/licenses/by-sa/3.0/de/legalcode, 3. in the case of an adaptation, a credit identifying the modification. 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 any different conditions or a higher resolution, please contact me through kontaktmartina-nolte.de or my discussion page