@article{RO_1981__15_3_271_0,
     author = {Borthakur, A.},
     title = {Joint distribution of the number of customers in the queue and the number of batches served at time $t$ within a busy period},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {271--277},
     publisher = {EDP-Sciences},
     volume = {15},
     number = {3},
     year = {1981},
     mrnumber = {637197},
     zbl = {0465.60085},
     language = {en},
     url = {http://archive.numdam.org/item/RO_1981__15_3_271_0/}
}