Table 3.
Electronic databases
| Identifier | Databases | URL |
|---|---|---|
| DB1 | IEEE Xplore | http://ieeexplore.ieee.org |
| DB2 | Springer Link | http://link.springer.com |
| DB3 | Science Direct | http://www.sciencedirect.com |
| DB4 | Scopus | https://www.scopus.com |
Official websites use .gov
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.gov website belongs to an official
government organization in the United States.
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information only on official, secure websites.