https://www.youtube.com/channel/UCuZdDGvTsrw7UK8GGDYJQBA
https://www.youtube.com/@a.i.siddiq5587
https://www.youtube.com/@user-ri3xn1ey6n
https://www.makktaba.com/2013/12/Books-Electronic-control-systems.html
https://download-engineering-pdf-ebooks.com/231-1-library-books