https://creativecommons.org/licenses/by-sa/4.0 | OPENAIRE |
http://creativecommons.org/licenses/by-sa/3.0 | OPENAIRE |
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http://creativecommons.org/licenses/BY-SA/4.0 | OPENAIRE |
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https://creativecommons.org/licenses/by-sa/4.0/ | OPENAIRE |
http://creativecommons.org/licenses/by-sa/3.0/es/ | OPENAIRE |
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https://creativecommons.org/licenses/by-sa/3.0/pl | OPENAIRE |
https://creativecommons.org/licenses/by-sa/3.0/de/ | OPENAIRE |
http://creativecommons.org/licenses/by-sa/ | OPENAIRE |
https://creativecommons.org/licenses/by-sa/3.0/ | OPENAIRE |
http://creativecommons.org/licenses/by-sa/2.0/at/ | OPENAIRE |
http://creativecommons.org/licenses/by-sa/4.0 | OPENAIRE |
https://creativecommons.org/licenses/by-sa/4.0/deed.en | OPENAIRE |
CC BY SA | OPENAIRE |
CC BY-SA 4.0 | OPENAIRE |
cc-by-sa | OPENAIRE |
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https://creativecommons.org/licenses/by-sa/4.0/legalcode | OPENAIRE |
http://creativecommons.org/licenses/by-sa/2.0/uk/ | OPENAIRE |
https://creativecommons.org/licenses/by-sa/3.0/de | OPENAIRE |
http://creativecommons.org/licenses/by-sa/4.0/ | OPENAIRE |
http://creativecommons.org/licenses/by-sa/4.0/deed.de | OPENAIRE |
http://creativecommons.org/licenses/by-sa/4.0/legalcode | OPENAIRE |
https://creativecommons.org/licenses/by-sa/3.0/at | OPENAIRE |