The Abkhaz Language  
   Brief historical and technical profile of the dialects spoken in Abkhazia, an autonomous republic within the former Soviet Georgia.
   http://www.abkhazia.org/lang.html

Caucasian Languages  
   Brief profile and list of languages, some with links to further information.
   http://www.peoples.org.ru/eng_kavkaz.html

Udi Online Grammar  
   Online grammar of Udi, spoken in Northern Azerbaijan and Eastern Georgia. Contains grammatical description, samples of Spoken Udi, text collection with interlinear glosses and translation, and bibliography.
   http://www.lrz-muenchen.de/~wschulze/Uog.html

Ergative Case in the Circassian Languages  
   Paper examining the marking of ergative/absolutive case in various types of nominals subsequently relating their distribution to the nominal hierarchy.
   http://www.ling.lu.se/disseminations/pdf/45/Kumachov_et_al.pdf

Long-Distance Agreement in Tsez  
   Article by Eric Potsdam and Maria Polinsky, discussing cases of agreement extending beyond the clause.
   http://ling.ucsd.edu/~polinsky/pubs/lda.pdf