Correlating Alerts Using Prerequistes of Intrusions.
You can download it from the following link: https://packetstormsecurity.com/files/download/51891/Correlating-Alerts-Using-Prerequistes-of-Intrusions.pdf
Source: https://packetstormsecurity.com/files/51891/Correlating-Alerts-Using-Prerequistes-of-Intrusions.pdf.html