@article{kim2015-portal,
  author = {Kim, Yonghee and Kim, Jonghoon and Choi, Jeongil and Kim, YounSung},
  title = {International Comparison on Efficiency of Portal Service Providers Using Stochastic Frontier Analysis},
  journal = {International Journal of u-and e-Service, Science and Technology},
  year = {2015},
  volume = {8},
  number = {12},
  pages = {183--186},
  doi = {10.14257/ijunesst.2015.8.12.18}
}