P. A. Woudt, R. P. Fender, R. P. Armstrong, and C. Carignan, “Early science with the Karoo Array Telescope test array KAT-7”, S. Afr. J. Sci., vol. 109, no. 7/8, p. 2, Jul. 2013, doi: 10.1590/sajs.2013/a0030.