1. Efficient QRP Data communications (Ефективна передача даних QRP) - http://oh8stn.org/blog/2023/04/20/efficient-qrp-data-communications/
2. The Great Circle Map (побудувати азимутальну карту використовуючи свій QTH локатор) - https://vu2nsb.com/radio-systems/geodesy-terrestrial-hf-radio/the-great-circle-map-gcm/?utm_source=rss&utm_medium=rss&utm_campaign=the-great-circle-map-gcm
3. IARUMS R1 Newsletter March 2023 - https://www.iaru-r1.org/2023/iarums-r1-newsletter-march-2023/
4. Mac-based Amateur Radio Digital Applications — Installation and Integration, v. 2.1 - https://www.machamradio.com/blog/2023/04/26/mac-based-amateur-radio-digital-applications-installation-and-integration-v-2-1/
5. 160m Inverted Delta Loop - http://www.ik1mnj.com/160m.-inverted-delta-loop.html
