Validity and Mechanical Turk: An assessment of exclusion methods and interactive experiments. - Kyle A. Thomas; Scott Clifford (Comput. Hum. Behav., 2017)

Detecting Fraud in Online Surveys by Tracing, Scoring, and Visualizing IP Addresses. - Philip D. Waggoner; Ryan Kennedy; Scott Clifford (J. Open Source Softw., 2019)