@article{10_4064_am_11_4_439_449,
     author = {J. Bartoszewicz and T. Rolski},
     title = {Queueing systems with a reserve service channel},
     journal = {Applicationes Mathematicae},
     pages = {439--449},
     publisher = {mathdoc},
     volume = {11},
     number = {4},
     year = {1969},
     doi = {10.4064/am-11-4-439-449},
     zbl = {0226.60113},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-11-4-439-449/}
}