As Area Editor he was responsible for the Mathematical Linguistics area of the " Oxford International Encyclopedia of Linguistics ", and his joint work with Geoffrey Pullum, " The X-bar Theory of Phrase Structure " formally reconstructed that then-popular linguistic theory.
12.
The seven authors of his Russian obituary recount " & the breadth of his interests was truly extraordinary : he was seriously interested in history and philosophy, passionately loved and had a good knowledge of literature and art, often came forward with reports and lectures on the most diverse topics ( for example, on Escher ), actively took part in the work of the cinema club in Yaroslavl and the music club at the House of Composers in Moscow, and was a continual participant of conferences on mathematical linguistics and on semiotics ."
