A body of rules that delineate private rights and remedies, and govern disputes between individuals in such areas as contracts, property, and Family Law; distinct from criminal or public law. Civil law systems, which trace their roots to ancient Rome, are governed by doctrines developed and compiled by legal scholars. Legislators and administrators in civil law countries use these doctrines to fashion a code by which all legal controversies are decided. Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results. Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature. Systematic reviews determine an objective list of criteria, and find all previously published original research papers that meet the criteria. They then compare the results presented in these papers. Literature reviews, by contrast, provide a summary of what the authors believe are the best and most relevant prior publications. The concept of "review article" is separate from the concept of peer-reviewed literature. It is possible for a review to be peer-reviewed, and it is possible for a review to be non-peer-reviewed.