Table 1. Academic databases.

Academic database	Link
DBLP	http://dblp.uni-trier.de/
ACM digital library	http://dl.acm.org/
IEEEXplore	https://ieeexplore.ieee.org/
Sciencedirect	http://www.sciencedirect.com/
Springerlink	https://link.springer.com/
PubMed	https://pubmed.ncbi.nlm.nih.gov/
Scopus	https://www.scopus.com/
Web of science	https://apps.webofknowledge.com/