DiTrapani J, Rockwood N, Jeon M. Explanatory IRT analysis using the SPIRT macro in SPSS. TQMP. 2018;14(2):81-98. doi: 10.20982/tqmp.14.2.p081
Smith VK, Mansfield CA, Klaiber HA. Terrorist threats, information disclosures, and consumer sovereignty. Information economics and policy. 2013 Dec;25(4):225-34.