1
by Martio, Olli, Ryazanov, Vladimir, Srebro, Uri, Yakubov, Eduard
Published 2009
Springer New York
.... The techniques are geometric and they have turned out to be an indispensable tool in the study of quasiconformal...

2
by Gutlyanskii, Vladimir, Ryazanov, Vladimir, Srebro, Uri, Yakubov, Eduard
Published 2012
Springer New York
... that turned out to be not only sufficient but also necessary...