“…Systematic literature review [19,46,[54][55][56][57] Variation of prices in the short term market (MCP) Systematic literature review [46,49,54,[56][57][58] Credibility in the supplier and trader Systematic literature review [19,46] Regulations Migration procedures Systematic literature review [52] Termination of the ACR energy contract Gray literature [39,51,59] Return from ACL to ACR Gray literature [30,39,51,59] Step 2: Gray literature, or literature published by non-traditional publishers, such as the government or non-profit organizations, can be particularly valuable for current awareness due to its nature [60]. This literature differs from the SLR in that they are materials produced by professionals who are not included in academic forums [61].…”