K.  Pushkin, Akerlof, C., Anbajagane, D., Armstrong, J., Arthurs, M., Bringewatt, J., Edberg, T., Hall, C., Lei, M., Raymond, R., Reh, M., Saini, D., Sander, A., Schaefer, J., Seymour, D., Swanson, N., Wang, Y., and Lorenzon, W., ?Study of radon reduction in gases for rare event search experiments?, 2018.