@article{DoelitzscherSulistioReichetal.2011, author = {Frank D{\"o}litzscher and Anthony Sulistio and Christoph Reich and Hendrik Kuijs and David Wolf}, title = {Private cloud for collaboration and e-Learning services: from IaaS to SaaS}, series = {Computing}, volume = {91.2011}, number = {1}, issn = {1436-5057}, doi = {10.1007/s00607-010-0106-z}, pages = {23 -- 42}, year = {2011}, language = {en} }