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Yellow dashed lock, designed to flag sources that are free to read (free as in gratis), under some conditions. These conditions typically are that (free) registration is required to read the source, or that the first few views of the article are free, but subsequent views required payment.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse
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