@article{article, title  = {{Substance without citation: evaluating the online impact of grey literature}},

 publisher = {{Springer Science and Business Media LLC}},

 url = {{http://dx.doi.org/10.1007/s11192-013-1068-7 }},

 year = {{2013}},

 month = {{6}},

 author = {{Wilkinson D and Sud P and Thelwall M}},

 doi = {{10.1007/s11192-013-1068-7}},

 volume = {{98}},

 journal = {{Scientometrics}},

 issue = {{2}},

 pages = {{797-806}},

 note = {{Accessed on 2024/09/19}}}