Journal of the Brazilian Computer Society

Table 2 Search engine and retrieved, not duplicated and selected primary studies

From: Overview and open issues on penetration test

Database	Retrieved	Not duplic.	Selected	Prec. rate	Rate index
ACM DL	144	141	8	0.0555	0.1481
IEEE Xplore	531	523	32	0.0602	0.5925
SCOPUS	128	90	3	0.0234	0.0555
Springer Link	342	336	11	0.0321	0.2037
Total	1145	1090	54

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