Dahlgren, Hanna, Torbjörn Sundberg, Andrew Collier, Etienne Koen, and Stephen Meyer. “Solar Flares Detected by the New Narrowband VLF Receiver at SANAE IV”. South African Journal of Science 107, no. 9/10 (September 6, 2011): 8 pages. Accessed May 4, 2024. https://sajs.co.za/article/view/9990.