The International Dupuytyren Society site contains everything you want to know about Dupuytren's disease, including symptoms, treatment options, related diseases, research, and links to other useful resources.
The Dupuytren Foundation is a US site that has a simple mission statement: to promote research, education and global collaboration to find a cure for Dupuytren's disease.
Book published by SpringerLink: Dupuytren’s Disease and Related Hyperproliferative Disorders (Principles, Research, and Clinical Perspectives), Authors: Charles Eaton, M. Heinrich Seegenschmiedt, Ardeshir Bayat, Giulio Gabbiani, Paul Werker and Wolfgang Wach. ISBN-10:3642226965; ISBN-13:978-3642226960; also available as an ebook.
Percutaneous needle fasciotomy for Dupuytren's disease: report on a randomized clinical trial and related research, (2012) Rijssen, Annet Laura van. This thesis contains an excellent and up to date summary of the available clinical treatments for Dupuytren's.
NewReport on Needle Aponeurotomy for Dupuytren Contracture in over 1,000 fingers, finding that PIP joints are more difficult to correct and have higher recurrence.