Get.Abstracts           Get Abstracts of user-defined search query
Get.Publication.info    Retrieve all publications related to
                        user-defined search query from PubMed database
Plot.TopJournals        Plot Top cited Journals from data returned by
                        "Get.Publication.info" Function
Plot.TopPapers          Plot Top cited publications from data returned
                        by "Get.Publication.info" Function
Plot.papertype          Plot papers type returned by
                        "Get.Publication.info" Function
