@article{RO_1981__15_1_27_0,
     author = {Perros, H. G.},
     title = {A two-level open queue network with blocking and feedback},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {27--38},
     publisher = {EDP-Sciences},
     volume = {15},
     number = {1},
     year = {1981},
     mrnumber = {609475},
     zbl = {0452.90027},
     language = {en},
     url = {http://www.numdam.org/item/RO_1981__15_1_27_0/}
}