> Is there any dissertation/high-school diploma style for Context? I'm sure if there any, I can adapt it to Ukrainian standards (dstu 3008-95).

>>Unless you can find a module (at http://modules.contextgarden.net/) then you'll have to design it yourself. 

The closest thing I found is
http://wiki.contextgarden.net/Law_Faculty_University_of_Ljubljana_Styling_and_citations
but it's a bit outdated and far from complete.

Maybe someone did his/her thesis in ConTeXt?

Vyatcheslav Yatskovsky