@article{VMUMM_1985_4_a4,
     author = {N. A. Drozdov},
     title = {The probability of being busy for a periodic queueing system},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {25--28},
     publisher = {mathdoc},
     number = {4},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1985_4_a4/}
}