CC-BY-SA. If you want other conditions, or have further questions about the terms of licence, please contact me. If you use one of my picture, I appreciate very much if you send me an email. The CC-BY-SA license is incompatible with Facebook's licensing terms. It is not allowed to upload this file to Facebook.
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.
https://creativecommons.org/licenses/by/4.0CC BY 4.0 Creative Commons Attribution 4.0 truetrue