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Table 2 Data sources and publication for each step of phase 2 of SLR

From: An analytical study of information extraction from unstructured and multidimensional big data

Data sources Publication count
Searched results Selected based on title Selected based on abstract Selected based on full study + duplicate removal
Wiley Online Library 1012 531 24 3
Scopus 461 146 31 12
Springer 548 204 47 22
IEEE Xplore 203 124 68 36
ACM 633 183 42 10
ScienceDirect 281 122 36 8
Total 3138 1310 248 91