@article{TVP_1977_22_4_a18,
     author = {V. G. U\v{s}akov},
     title = {A queueing system with {Erlang} incoming flow with relative priority},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {860--866},
     year = {1977},
     volume = {22},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1977_22_4_a18/}
}