S. K. Gupta. Queues fed by Poisson input and hyper-mixed Erlangian service time distribution with finite waiting space. Math. Meth. of OR, 9(2):80-90, 1965. [doi]
@article{Gupta65,
title = {Queues fed by Poisson input and hyper-mixed Erlangian service time distribution with finite waiting space},
author = {S. K. Gupta},
year = {1965},
doi = {10.1007/BF01919476},
url = {http://dx.doi.org/10.1007/BF01919476},
researchr = {https://researchr.org/publication/Gupta65},
cites = {0},
citedby = {0},
journal = {Math. Meth. of OR},
volume = {9},
number = {2},
pages = {80-90},
}