Role-finding/role-engineering (panel session). - Haio Roeckle (ACM Workshop on Role-Based Access Control, 2000)

Process-oriented approach for role-finding to implement role-based security administration in a large industrial organization. - Haio Roeckle; Gerhard Schimpf; Rupert Weidinger (ACM Workshop on Role-Based Access Control, 2000)

Schmeh, Klaus: Versteckte Botschaften (TELEPOLIS): Die faszinierende Geschichte der Steganografie - 246 Seiten, dpunkt Verlag, 2008, ISBN: 3936931542. - Haio Röckle (Datenschutz und Datensicherheit, 2009)