From 2021 (7C)
Rees, F., Geiger, M., Lilleholt, L., Zettler, I., Betsch, C., Böhm, R., & Wilhelm, O. (2022). Measuring parents’ readiness to vaccinate themselves and their children against COVID-19. https://doi.org/10.1016/j.vaccine.2022.04.091
Geiger, M., Rees, F., Lilleholt, L., Santana, A.P., Zettler, I., Wilhelm, O., Betsch, C., & Böhm, R. (2021). Measuring the 7Cs of vaccination readiness. European Journal of Psychological Assessment. https://doi.org/10.1027/1015-5759/a000663
Before 2021 (5C)
Betsch, C., Schmid, P., Heinemeier, D., Korn, L., Holtmann, C., & Böhm, R. (2018). Beyond confidence: Development of a measure assessing the 5C psychological antecedents of vaccination. PloS one, 13(12), e0208601. https://doi.org/10.1371/journal.pone.0208601