1. 6m SSB & CW QRP transceiver - http://lea.hamradio.si/~s57nan/ham_radio/ssb_6m/ssb6m.html#latest_comments

** 6m Projects - Directional Antennas - http://www.pg1n.nl/articles.php?lng=en&pg=147

2. Калькулятори для р/а розрахунків - http://www.pa7mu.com/calculators.html

3. rtl_tcp SDR for IOS version 1.4.1 - https://www.machamradio.com/

4. F1ATB: Remote SDR V2 – Manual installation - https://f1atb.fr/index.php/2021/05/03/remote-sdr-v2-manual-installation/

** F1ATB/Remote-SDR - https://github.com/F1ATB/Remote-SDR

5. Результати 2020 CQ DX Marathon - http://www.dxmarathon.com/Results/2020/Results2020.htm