Close Petrogenesis of Swartruggens and Star Group II kimberlite dyke swarms, South Africa: constraints from whole rock geochemistry,
Coe, N., A. P. Le Roex, J. J. Gurney, et al. (2008) (2008),
Contributions to Mineralogy and Petrology, 156 p. 627–652,
10.1007/s00410-008-0305-1.