Helms, Y. B., Hamdiui, N., Kretzschmar, M. E. E., Rocha, L. E. C., van Steenbergen, J. E., Bengtsson, L., . . . Stein, M. L. (2021). Applications and Recruitment Performance of Web-Based Respondent-Driven Sampling: Scoping Review. J Med Internet Res.

Helms, Yannick B., Nora Hamdiui, Mirjam E E. Kretzschmar, Luis E C. Rocha, Jim E. van Steenbergen, Linus Bengtsson, Anna Thorson, Aura Timen, and Mart L. Stein. "Applications and Recruitment Performance of Web-Based Respondent-Driven Sampling: Scoping Review." J Med Internet Res 2021.

Helms, Yannick B., et al. "Applications and Recruitment Performance of Web-Based Respondent-Driven Sampling: Scoping Review." J Med Internet Res 2021.