introduction: purchasing scientific journals take a large amount of university library budget. so choosing journals with a scientific validity that response to universities needs is so important. this article aims to have a survey on usage rate of isfahan university of medical sciences users on public, environmental and occupational health journals to confirm core journals via bradford scatteri...

objective: citation analysis is a bibliometric method used for the calculation of the mean number of citations and detection of highly cited references, frequency distribution of citations in different languages, update rate, efficacy of resources and number of core journals of a scientific domain. this process elucidates the information needs of researchers in a specific realm of science and e...