How much Udi is Udi?

SCHULZE, Wolfgang. How much Udi is Udi? In Conference on endangered languages. medzinárodná konferencia. Endangered languages of the Caucasus and beyond : [conference proceeding], 13-16 October 2014, Ardahan. 1. vyd. - Leiden : Brill, 2017. ISBN 978-90-04-32564-7, s. 187-208 [1,10 AH].