Open Access Policy

OPEN BOOKS provide immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.

The content is distributed under the Creative Commons Attribution License (CC BY 4.0):

Creative Commons Attribution License (CC BY 4.0)

Anyone is free:

to Share — to copy, distribute and transmit the work 
to Remix — to adapt the work

Under the following conditions:

Attribution. The original authors must be given credit. 

• For any reuse or distribution, it must be made clear to others what the license terms of this work are. 
• Any of these conditions can be waived if the copyright holders give permission. 
• Nothing in this license impairs or restricts the author's moral rights.