TY - JOUR AU - Srinivas R. Chakravarthy TI - Analysis of a multi-server queueing model with vacations and optional secondary services JO - Mathematica Applicanda PY - 2013 SP - 145 EP - 169 VL - 41 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14708/ma.v41i2.389/ DO - 10.14708/ma.v41i2.389 LA - pl ID - 10_14708_ma_v41i2_389 ER -