Editorial Main Article Content John Calle-Siguencia INGENIUS - EDITOR RESPONSABLE http://orcid.org/0000-0002-2148-3297 Keywords Abstract 339 | PDF (Español (España)) Downloads 294 PDF Downloads 94 Article Sidebar PDF (Español (España)) PDF Published Jun 30, 2018 Article Details Issue No. 20 (2018): july-december Section Editorial