Graph theory is a graphical representation of a set of objects which are connected by links and is basically studied in computers science and mathematics. Generally a graph comprises of vertices and edges, which are studied in discrete mathematics. Graphs are of two types Directed and Undirected. In directed graph also called as digraph are ordered pairs. While undirected graphs are not ordered pairs, there edges have no orientation.
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.
Last date updated on June, 2014