https://www.youtube.com/watch?v=AG_me95W0lU
https://www.youtube.com/watch?v=ZfXcXCB_RjE
http://www.howtofixit.gr/forum/showthread.php?t=66174
https://www.hlektronika.gr/forum/archive/index.php/t-43269.html
https://eclass.sch.gr/modules/document/file.php
http://digilib.teiemt.gr/jspui/bitstream/123456789/4370/1/STEF632001.pdf
http://users.teilar.gr/~trogadas/MIXANES/ERGASTHRIO%20MIXANES%20AC/ergastirioAC.pdf