Info about importing objects to dia

[Enrico Dutti <e dutti cpr it>]

Hi,

I just started working with dia for my degree thesis and I'd like to import 
to dia some of the drawings I have in other formats to use them in new 
documents. Is there any way to import objects in formats different from .dia, 
.dxf and .fig (for example sketch (.sk) files)? Maybe the problem is just 
that I don't know a program that exports to .dxf... 

If anyone can help I'd be grateful

thank you very much