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

» Circassian language online lessons
   Description of Circassian phonetics and main grammar forms, English-Circassian phrasebook.
   http://zihia.narod.ru/ing/instead.htm

» 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

» 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