Sending an article is equivalent to the author declaring that s/he is the holder of all the relevant copyrights to the materials submitted and the materials do not infringe upon the copyrights of others. Articles are published based on a royalty-free license with provisions identical with the pattern of the Creative Commons Attribution 3.0 license (also known as CC-BY-SA, available at http://creativecommons.org/licenses/by/3.0/).