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Author (s) retain the copyrights and will grant PJCJ the non-exclusive rights of first publication of manuscript electronically and in print form and to identify PJCJ  as the original publisher under Creative Commons Attribution License 4.0 International License. It will allow others to share the content with an explicit indication of the authorship and its initial publication in PJCJ.  Under these licensing terms, the author (s) confirm that all the content of the published manuscript will be distributed in the public domain and other researchers may use it exclusively for the non-profit scientific purpose (s) with the obligatory acknowledgment of authorship.

Author (s) reserves unconditional rights to copy and reproduce the published work for teaching, use it in other research and redistribute, share or place the copy of the article to any other medium or format, even commercially only if PJCJ is explicitly acknowledged as the original publisher. However, author (s) cannot apply any legal or technological measures that legally restrict others from doing anything that is already permitted under the license terms.