query: n/t participles and verbal nouns

[Charles Townsend]

>Are there any books or papers which treat the history of the expansion in
>Polish, Ukrainian, Belorussian, Czech of the p.p. participles in -t at the
>expense of those in -n (e.g. soznatyi)? Likewise of the verbal noun in -t
>for -n (e.g. pristatie)?
>Many thanks,  Moshe Taube

Dear Dr. Taube,

        I can be of no real help here with bibliography, but can only add
that Serbo-Croatian has the -znat- participial, too (which you've doubtless
already noticed yourself).  I've sometimes wondered myself how general this
phenomenon was in Slavic but have never traced it down.  Good luck with it.

        Charles Townsend