@conference{Obr2020,
  author    = {Obradović, M., Kljajić, M., Obradović, A., Pavićević, M.},
  title     = {E-Services: Efficiency and Use in Modern Business},
  booktitle = {Sinteza 2020 - International Scientific Conference on Information Technology and Data Related Research},
  year      = 2020,
  doi       = {10.15308/Sinteza-2020-128-133},
  pages     = {128-133}
}