Articles on e-learning or distance learning/ information system management

my major is information system management. my phd research is about challenges facing practitioners in distance learning system. in this order I need you to choose 3 articles from academic journals talk about distance learning or e-learning and each article MUST used theory of constraints (TOC) in its research,and then choose another 3 articles talk about distance learning or e-learning and each article MUST used communities of practice (COP)theory in its research. explain why each theory used in each article,the role of theory in each article, what the methodology (qualitative or quantitaive) used? how this methodology used based on the used theory in each article (linkage between theory and methodology)? what is the contribution to the theory in each article (if applicable)?. I will upload table template use it for each theory. all your discussion I want it in a table for each theory. so,you will do 2 tables one or TOC and the other for CoP. try to explain in details in 1000 words and focus more on the theories.