The impact factor(IF) of a research journal is a measure of the frequency with which the average article in it has been cited in a particular year, it ascertains the importance or rank of the journal. The IF is calculated by dividing the number of times its published articles were cited by the number of articles that were cited over a two-year period. The h-index measures the impact of a particular researcher, rather than a journal, in terms of the number of their published papers and the number of times they have been cited in other publications. For a set of papers, ranked in decreasing order of the number of citations that they received, the h-index is the (unique) highest number of papers that received h or more citations. The G-index is an improvement of the H-index for quantifying productivity based on publication record. It gives the highest number (g) of papers that together received g2 or more citations. i-10 index refers to the number of papers with 10 or more citations.