Hansjorg Kielhofer

Bifurcation Theory: An Introduction with Applications to PDEs (Applied Mathematical Sciences) by Hansjörg Kielhöfer Springer Hardcover 3 November 2003 from£66.96 | RRP: ~~£76.5~~
An Introduction to Contact Topology (Cambridge Studies in Advanced Mathematics) by Hansjörg Geiges Cambridge University Press Hardcover 13 March 2008 from£84.75 | RRP: ~~£47~~