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begin_abstract_This_paper_presents__.tex  section_Introduction_Earlier_in_cite__.tex  section_Learning_Management_Systems_and__.tex  section_Software_Architecture_Implementation_Aspects__.tex  figures/en_arch_LMS_red/en_arch_LMS_red.png  section_Software_Architecture_Implementation_Aspects__.tex  figures/en_management/en_management.png  figures/en_pic3_v2/en_pic3_v2.png  conclusions.tex