The foundations of the unBla method are publicly available here:

Wolf, Patricia & Troxler, Peter
The Proof of the Pudding is in the Eating—But What was the Pudding in the First Place?
A Proven Un-Conferencing Approach in Search of Its Theoretical Foundations

Forum Qualitative Sozialforschung / Forum: Qualitative Social Research, 9(2)
http://nbn-resolving.de/urn:nbn:de:0114-fqs0802614