1. USB Controlled QRP CW Transmitter Kit- https://hamcrafters2.com/
2. Printable QSO Logbook Template (Шаблон журналу QSO для друку) - https://dxexplorer.com/printable-qso-logbook-template/
3. Decoding Space Weather Data for HF Communication (Декодування даних космічної погоди для КХ зв'язку) - https://n6cta.com/2023/08/30/decoding-space-weather-data-for-hf-communication/
4. MagicSDR – IOS interface to RTLSDR version 23.09.3 - https://machamradio.com/blog/2023/09/12/magicsdr-ios-interface-to-rtlsdr-version-23-09-3-released/
5. RTL SDR V4 - Now with Built-In HF Upconverter + More Features - https://www.youtube.com/watch?v=xnNky4NhVGU&t=6s
