Moses, J., C. Kyriakakis, H. Weich, P. Rossouw, P. Herbst, and A. Doubell. “Persistant Left Superior Vena Cava – the Value of an Agitated Saline Contrast Study”. SA Heart Journal, vol. 11, no. 3, Mar. 2017, pp. 152-3, doi:10.24170/11-3-1753.