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The publisher of the Universidad Santiago de Cali adheres to the open access philosophy. This book is licensed under the terms of Creative Commons Attribution 4.0: Attribution 4.0 International (CC BY 4.0). (http://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution, and reproduction in any medium or format, provided credit is given to the original author(s) and source. Attribution - You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but in no way that suggests that the licensor endorses you or your use. Non-commercial - You may not use the material for commercial purposes. No Derivation - If you remix, transform or build upon the material, you may not distribute the modified material. No additional restrictions - You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.