1. FT817 Amp Project - https://vk3yy.wordpress.com/2012/08/25/ft817-amp/
** Yet Another Amp for the 817 - https://vk3yy.wordpress.com/2015/06/07/yet-another-amp-for-the-817/
2. UV8VU – чемпионат Украины на УКВ 202104.09.2021 - http://krrc.org.ua/index.php/uv8vu-ch-ukr-2021/
3. УКХ-контест "Козацька слава" (1600 UTC, Oct 09 to 0400 UTC, Oct 10) - http://cshonor-vhf.ho.ua/
4. Amateur Radio Guide to Digital Mobile Radio 2nd Edition- https://drive.google.com/file/d/1eiaYNR65RJanxnVbXdrWBs4cNG50mqn1/view
5. RASPBERRY PI for ham radio - https://hamprojects.wordpress.com/2020/09/06/raspberry-pi-for-ham-radio/