The scientific output of a researcher includes academic publications, creditability of these publications and number of citations. Universities and institutions evaluating the research activities have always taken into account the academic status and ranking of the researchers. Selection and application of an appropriate method to assess the academic activities have also been a concern for scientometrics centers. In the past, criteria such as number of publications, total number of citations and average number of citation were taken into consideration. In the past decade, a physicist named Hirsch (2005) introduced an index known as hirsch (h index) to evaluate scientific output (1).