@article{article, title = {{The high scholarly value of grey literature before and during Covid-19}}, publisher = {{Springer Science and Business Media LLC}}, url = {{http://dx.doi.org/10.1007/s11192-022-04398-3 }}, year = {{2022}}, month = {{5}}, author = {{Kousha K and Thelwall M and Bickley M}}, doi = {{10.1007/s11192-022-04398-3}}, volume = {{127}}, journal = {{Scientometrics}}, issue = {{6}}, pages = {{3489-3504}}, note = {{Accessed on 2024/12/28}}}