Guoping Zeng (June 2003), "Two common properties of the erlang-B function, erlang-C function, and Engset blocking function", Mathematical and Computer Modelling, 37 (12–13), Elsevier Science: 1287–1296, doi:10.1016/S0895-7177(03)90040-9
dtu.dk
oldcom.dtu.dk
Brockmeyer, E.; Halstrøm, H. L.; Jensen, Arne (1948), The life and works of A.K. Erlang(PDF), Transactions of the Danish Academy of Technical Sciences, vol. 2, Akademiet for de Tekniske Videnskaber, archived from the original(PDF) on July 19, 2011: 19–22
handle.net
hdl.handle.net
"Traffic handled on a circuit or group of circuits", CCIF - XIVth Plenary Assembly, Montreux, 26–31 October: International Telephone Consultative Committee, 1946, pp. 60–62, hdl:11.1004/020.1000/4.237.43.en.1001{{citation}}: CS1 maint: location (link)
Brockmeyer, E.; Halstrøm, H. L.; Jensen, Arne (1948), The life and works of A.K. Erlang(PDF), Transactions of the Danish Academy of Technical Sciences, vol. 2, Akademiet for de Tekniske Videnskaber, archived from the original(PDF) on July 19, 2011: 19–22