Van Dusen B., M. Shultz, J.M. Nissen, B.R. Wilcox, N.G. Holmes, M. Jariwala, E.W. Close, H.J. Lewandowski, and S. Pollock, American Journal Of Physics 89, 7-8 (2021).
Hu D., B.M. Zwickl, B.R. Wilcox, and H.J. Lewandowski, Physical Review Physics Education Research 13, 020134 (2017).
Wilcox B.R., B.M. Zwickl, R.D. Hobbs, J.M. Aiken, N.M. Welch, and H.J. Lewandowski, Physical Review Physics Education Research 12, 010139 (2016).