Lothman KA, Mangel AW. Pulse Synchronized Contractions (PSCs) - Editorial. J Cardiol Cardiovasc Med. 2019 Nov 15;4:199-200. doi: 10.29328/journal.jccm.1001067
Williams VSL. The "unbiased" anchor: bridging the gap between DIF and item bias. Appl Meas Educ. 1997;10(3):253-67. doi: 10.1207/s15324818ame1003_4
Reed (Earnshaw) SJ, Reed JH. The use of statistical quality control charts in monitoring interviewers. Proceedings of the Survey Research Methods Section, American Statistical Association. 1997 Jan;893-8.