Collaborative learning - a cure for intelligent tutoring systems. - Julika Siemer-Matravers (HCI (2), 1999)

Towards Community-Driven Development of Educational Materials: The Edukalibre Approach. - Jesús M. González-Barahona; Vania Dimitrova; Diego Chaparro; Chris Tebb; Teofilo Romera; Luis Canas; Julika Siemer-Matravers; Styliani Kleanthous (EC-TEL, 2006)