Documentary sections will be formed in which documents that deal with the categories, those that discuss the specificity of the relationships, those that address methodological issues, the most complete documents that seem to cover the conceptual structure, enrich the notions of the empirical referents, those that propose concrete procedures, techniques and instruments, those that have to fulfill the role of context; Also, and given the nature of the object of the study, chronicles, reports, and journalistic articles are grouped together.