On 2009-02-24 00:01, Piotr Gasiorowski wrote:
> I hope I haven't forgotten anything really important.
As a matter of fact, I have. In South Slavic (including OCS), *s^c^,
*z^3^ developed into /s^t, z^d/. Thus, in OCS and Bulgarian they merged
with the reflexes of *tj/*kt(i).
In Russian, they are realised as /s^:, z^:/ (long palatoalveolar
fricatives), whatever the modern spelling.
Piotr