J. S. Kaufman. Congestion Formulas for a Heterogeneous Server Loss System with Random Selection Discipline. Operations Research, 29(6):1167-1180, 1981. [doi]
@article{Kaufman81,
title = {Congestion Formulas for a Heterogeneous Server Loss System with Random Selection Discipline},
author = {J. S. Kaufman},
year = {1981},
doi = {10.1287/opre.29.6.1167},
url = {http://dx.doi.org/10.1287/opre.29.6.1167},
researchr = {https://researchr.org/publication/Kaufman81},
cites = {0},
citedby = {0},
journal = {Operations Research},
volume = {29},
number = {6},
pages = {1167-1180},
}