pictures

by Alexei Gorodentsev

by Alexei Gorodentsev

by Alexei Gorodentsev

by Alexei Gorodentsev

by Sergei Kuleshov

by Alexei Gorodentsev

from the web page of Warwick Institute

from the Youlia Tiourina's web page

I am thankful to Alexei Gorodenstev for letting me use his pictures for this page.