Service Level Agreement Management with Adaptive Coordination. - Dominic A. P. Greenwood; Giosuè Vitaglione; Lukas Keller; Monique Calisti (ICNS, 2006)

Two Thousand Points of Interaction: Augmenting Paper Notes for a Distributed User Experience. - Gunnar Harboe; Gelek Doksam; Lukas Keller; Elaine M. Huang (Distributed User Interfaces, 2013)