@article{RO_1989__23_3_283_0,
     author = {Lambros, A. and Pombortsis, A. and Sideridis, A. and Tambouratzis, D.},
     title = {A generalization of the {Erlang's} {B} formula},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {283--288},
     publisher = {EDP-Sciences},
     volume = {23},
     number = {3},
     year = {1989},
     mrnumber = {1025080},
     zbl = {0678.90036},
     language = {en},
     url = {http://www.numdam.org/item/RO_1989__23_3_283_0/}
}