1. Solution of some problems in the theory of probabilities of significance in automatic telephone exchanges;Erlang;Elektrotkeknikeren,1917
2. Über eine aufgabe der wahrscheinlichkeitstheorie I;Pollaczek;Math. Zeitschrift,1930
3. Mathematical theory of stationary queues;Khintchine;Matem. Sbornik,1932
4. The single server queue in heavy traffic;Kingman,1961
5. An approximate formula for waiting time in single server queues;Marchal;AIIE Trans.,1976