@article{10_4064_am_15_2_149_154,
     author = {Joanna Huk},
     title = {Heterogeneous queueing systems $M/M_i/2$ with balking},
     journal = {Applicationes Mathematicae},
     pages = {149--154},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1976},
     doi = {10.4064/am-15-2-149-154},
     zbl = {0355.60056},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-15-2-149-154/}
}