Zainud-din, Z. N, N. H Sabri, R. Umar, and C. Monstein. 2021. “The Study on the Effect of Population Density on Radio Frequency Interference (RFI) Analysis on Dynamic Spectrum at Selected CALLISTO Stations”. Physical Sciences and Technology 8 (1-2):53-61. https://doi.org/10.26577/phst.2021.v8.i1.07.