Text at begin of Bibliography

[Wolfgang Engelmann]

Hi,

I would like to add a short text at the begin of the citations in the 
Bibliography. I did not find an instruction in the extended LyX help. Does 
somebody remember how to do it? Would I have to use Bibtopic?

Bibliography
The numbers behind the citations refer to the page(s). With a suitable 
pdf-reader a click brings you to the page.

S. Argyropoulos and S. Wilson. Sleep dis- 
  turbances in depression and the effects of
  antidepressants. Int Rev Psychiatry, 17:
  237–245, 2005. 125

....

Thanks,

Wolfgang