Licence Term
Copyright @2019.
articles of this journal licensed under a https://creativecommons.org/licenses/by/4.0
Copyright without Restrictions
The journal allows the author(s) to hold the copyright without restrictions.
Copyright @2019.
articles of this journal licensed under a https://creativecommons.org/licenses/by/4.0
Copyright without Restrictions
The journal allows the author(s) to hold the copyright without restrictions.