Timing in Information Security: An Event Study on the Impact of Information Security Investment Announcements
E. Szubartowicz, G. Schryen, Journal of Information System Security 16 (2020) 3–31.

Information Security Investments: An Exploratory Multiple Case Study on Decision-Making, Evaluation and Learning
E. Weishäupl, E. Yasasin, G. Schryen, Computers &; Security 77 (2018) 807–823.