Höglinger, Marc, Ben Jann, and Andreas Diekmann. “Sensitive Questions in Online Surveys: An Experimental Evaluation of Different Implementations of the Randomized Response Technique and the Crosswise Model”. Survey Research Methods 10, no. 3 (December 10, 2016): 171-187. Accessed August 3, 2021. https://ojs.ub.uni-konstanz.de/srm/article/view/6703.