TY - JOUR U1 - Wissenschaftlicher Artikel A1 - Marepalli, Sai Manoj A1 - Sultana, Razia A1 - Christ, Andreas T1 - The Challenges of Collaborative Learning in Cloud and a Three Layered Architecture Towards the Solution JF - 3rd International Conference on Digital Information and Communication Technology and Its Applications (DICTAP 2013) : Ostrava, Czech Republic, 8 - 10 July 2013 KW - E-Learning Y1 - 2013 SN - 978-1-5108-0865-2 SB - 978-1-5108-0865-2 SP - 134 EP - 139 ER -