Hutton, G. (2009). Scientific Grey Literature in a Digital Age: Measuring its Use and Influence in an Evolving Information Economy. American Society for Information Science and Technology (ASIS&T)
This paper outlines methodologies to improve understanding of the influence of grey literature published in print and digital formats. The study is based on analyses of citation data regarding the UN-based Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection collected from Web of Science, Google, and Google Scholar.