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In submitting the manuscript to the journal, the authors certify that:

• The authors retain copyright and grant the journal the right of first publication, with the work simultaneously licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
• They are authorized by their co-authors to enter into these arrangements.
• The work described has not been formally published before, except as an abstract or as part of a published lecture, review, thesis, or other journal.
• That it is not under consideration for publication elsewhere,
• That its publication has been approved by all the author(s) and by the responsible authorities, tacitly or explicitly, of the institutes where the work has been carried out.
• They secure the right to reproduce any material that has already been published or copyrighted elsewhere.
• They agree to the following license and copyright agreement.