http://vatec2.fkidg1.uni-frankfurt.de/ (https://www.hunturk.net/forum/sistem.php?islem=yonlendir&url=aHR0cDovL3ZhdGVjMi5ma2lkZzEudW5pLWZyYW5rZnVydC5kZS8=)
PDF
http://vatec2.fkidg1.uni-frankfurt.de/vatecasp/Vatectexte.pdf (https://www.hunturk.net/forum/sistem.php?islem=yonlendir&url=aHR0cDovL3ZhdGVjMi5ma2lkZzEudW5pLWZyYW5rZnVydC5kZS92YXRlY2FzcC9WYXRlY3RleHRlLnBkZg==)
TTK.