1 - Sedgwich et al. (2017) - via Vaccari catalogue
2 - 6dF
4 - 2MRS
8 - IRASpscz
16 - Chincarini et al. (1984)
32 - Dressler et al. (1988)
64 - Loveday et al. (1996)
128 - Maza et al. (1995)
256 - Tully et al. (2008)