@article{5790, title = {A semigroup approach to queueing systems}, author = {Haji, A. and Radl, A.}, journal = {Semigroup Forum}, volume = {75}, number = {3}, pages = {610-624}, organization = {Max-Planck-Gesellschaft}, school = {Biologische Kybernetik}, month = dec, year = {2007}, doi = {10.1007/s00233-007-0726-6}, month_numeric = {12} }