Licence Term

Copyright @ 2018 Authors. This is an open access article distributed under the terms of the access article distributed under the terms of the Creative Commons Atribution- NonCommercial 4.0 International License (http://creativecommons.org/licences/by-nc/4.0/), which permits unrestricted non- commercial use, distribution, and reproduction in any medium, provided the original author andsource are properly cited.