OLD TESTAMENT PSEUDEPIGRAPHA WATCH: Zosime (Réchabites) is a project on The Story of Zosimus/The History of the Rechabites at the Catholic University of Leuven headed by Prof. Jean-Claude Haelewyck. It includes French translations of the Greek text and two Syriac versions.
I have a couple of relevant conference papers from 2003 online: The Rechabites in Patristic and Parabiblical Literature and Is the Story of Zosimus Really a Jewish Composition?
