Transformations of Darboux Integrable Systems
Proceedings of the 2008 Abel Conference, Tromso, Norway, June 17-22, 2008. Published by Springer. Online version of book available online through link above; subscription required to access content.
Anderson, I. and Fels, M. (2009). Transformations of Darboux Integrable Systems in Differential equations: Geometry, symmetries and integrability : the Abel Symposium 2008, proceedings of the Fifth Abel Symposium, Tromsø, Norway, June 17-22, 2008. Berlin: Springer.