The high scholarly value of grey literature before and during Covid-19.

Kayvan Kousha Mike Thelwall Matthew Bickley

Published in: Scientometrics (2022)

Keyphrases

wide range
search engine
information systems
digital libraries
significantly lower
grey system theory
data sets
learning algorithm
decision trees
image segmentation
three dimensional
bayesian networks
evolutionary algorithm
hidden markov models
high precision
high levels