Electronic Signatures for Public Procurement across Europe. - Jon Ølnes; Anette Andresen; Stefano Arbia; Markus Ernst; Martin Hagen; Stephan Klein; Giovanni Manca; Adriano Rossi; Frank Schipplick; Daniele Tatti; Gesa Wessolowski; Jan Windheuser (ISSE, 2008)

A General Quality Classification System for eIDs and e-Signatures. - Jon Ølnes; Leif Buene; Anette Andresen; Håvard Grindheim; Jörg Apitzsch; Adriano Rossi (ISSE, 2009)