Ball, W. H. Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society;
Howe, R., Basu, S., Davies, G. R., Ball, W. H., Chaplin, W. J., Elsworth, Y., et al. (2016). Parametrizing the time variation of the `surface term' of stellar p-mode frequencies: application to helioseismic data. Mon. Not. Roy. Astron. Soc., 464, 4777-4788. doi:10.1093/mnras/stw2668.