Support of cyrillic letters in Dia

[Sergei Astanin <sergei dgap mipt ru>]

Hello!

I'd like to create EPS or TeX diagrams with Dia. They look well in Dia, but
when I export them to EPS or TeX PSTricks, all cyrillic notices are left (at
worst they are displayed as Chinese glyphs when I look at the EPS with gv).

What should I do to use diagrams with non-Latin characters in TeX?

Thank you in advance,
Sergei Astanin