Hak J. Kim. IP telephony in the enterprise network: comparing operating costs of PSTN and IP network. IJBIS, 3(1):21-39, 2008. [doi]
@article{Kim08:5,
title = {IP telephony in the enterprise network: comparing operating costs of PSTN and IP network},
author = {Hak J. Kim},
year = {2008},
doi = {10.1504/IJBIS.2008.016051},
url = {http://dx.doi.org/10.1504/IJBIS.2008.016051},
researchr = {https://researchr.org/publication/Kim08%3A5},
cites = {0},
citedby = {0},
journal = {IJBIS},
volume = {3},
number = {1},
pages = {21-39},
}