SoCCR - Optimistic Concurrency Control for the Web-Based Collaborative Framework Metafora. - Andreas Harrer; Thomas Irgang; Norbert Sattes; Kerstin Pfahler (CRIWG, 2012)

The Metafora Design Principles for a Collaborative, Interoperable Learning Framework. - Andreas Harrer; Thomas Irgang; Andreas Lingnau; Norbert Sattes; Kerstin Pfahler (CRIWG, 2013)

The Metafora Tool: Supporting Learning to Learn Together. - Reuma De Groot; Toby Dragon; Manolis Mavrikis; Andreas Harrer; Kerstin Pfahler; Bruce M. McLaren; Rupert Wegerif; Chronis Kynigos; Baruch B. Schwarz (CSCL (2), 2013)

Kollaboratives Planen und Lernen mit der web-basierten Lernplattform Metafora. - Andreas Harrer; Kerstin Pfahler; Andreas Lingnau; Vanessa Herbst; Norbert Sattes; Thomas Irgang (DeLFI, 2013)

Research on Collaborative Planning and Reflection - Methods and Tools in the Metafora Project. - Andreas Harrer; Kerstin Pfahler; Reuma De Groot; Rotem Abdu (EC-TEL, 2013)

Planning for Life - Educate Students to Plan: Syntactic and Semantic Support of Planning Activities with a Visual Language. - Andreas Harrer; Kerstin Pfahler; Andreas Lingnau (ICALT, 2013)