1. QRP CW TRANSCEIVER MTR-A - https://uarl.info/forum/index.php?topic=162.0
2. Links in Logging - Contest Software - https://www.vkham.com/links/logging---contest-software-16/page1
3. Диплом WAIL (Worked All Italian Lighthouses) - http://www.arigenova.it/wail/pdf/rules.pdf
4. UZ5ZV on tower (Александр, UZ5ZV, на мачте. Подтяжка болтов крепления секций.) - https://www.youtube.com/watch?v=c9ZsM1xpO6A&t=29s
5. Теплое ламповое интернет-радио - https://habr.com/ru/company/ruvds/blog/511822/
