TY - CONF T1 - Provisioning strong and weak OER: Requirements of open informational Ecosystems T2 - Open Education Global Conference 2015 Y1 - 2015 A1 - Heinen, Richard A1 - Michael Kerres A1 - Ingo Blees A1 - Rittberger, Marc JF - Open Education Global Conference 2015 CY - Banff, Alberta, Canada UR - https://www.researchgate.net/publication/280317907_Provisioning_strong_and_weak_OER_Requirements_of_open_informational_Ecosystems ER -