1. QRP SSB (Приватна група 971 учасників) - https://www.facebook.com/groups/qrpssb/discussion/preview
2. WSJT-X 2.6.1 - https://wsjt.sourceforge.io/wsjtx.html
3. VARA (VARA HF, FM, SAT, Chat, Terminal) - https://rosmodem.wordpress.com/
4. Top 10 Portable HF Antennas - https://www.youtube.com/watch?v=BYG76axXoFo
5. Signals Received Worldwide - v2.56.4 - https://rxx.classaxe.com/en/rww/signals
** Signals Received in Europe - v2.56.4 - https://rxx.classaxe.com/en/reu/signals
