From h to p Efficiently: Selecting the Optimal Spectral/hp Discretisation in Three DimensionsC. D. Cantwell, S. J. Sherwin, R. M. Kirby and P. H. J. KellyMath. Model. Nat. Phenom., 6 3 (2011) 84-96DOI: https://doi.org/10.1051/mmnp/20116304