Harker, G., Zaroubi, S., Bernardi, G., Brentjens, M. A., de Bruyn, A. G., Ciardi, B., Jelic, V., Koopmans, L. V. E., Labropoulos, P., Mellema, G., Offringa, A., Pandey, V. N., Schaye, J., Thomas, R. M., & Yatawatta, S. (2009). Non-parametric foreground subtraction for 21-cm epoch of reionization experiments. Monthly Notices of the Royal Astronomical Society, 397(2), 1138-1152. doi:10.1111/j.1365-2966.2009.15081.x.