TY - JOUR AU - Joanna Huk TI - Heterogeneous queueing systems $M/M_i/2$ with balking JO - Applicationes Mathematicae PY - 1976 SP - 149 EP - 154 VL - 15 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/am-15-2-149-154/ DO - 10.4064/am-15-2-149-154 LA - en ID - 10_4064_am_15_2_149_154 ER -